A trend is a line of general direction of movement, a prevailing tendency of inclination, a style or preference, a line of development, or the general movement over time of a statistically detectable change. In a few words, "trend" is a synonym to "tendency".

A fad is a practice or interest followed for a time with exaggerated zeal. The nature of fad is individual. It could be called as an individual/individual society's over interest in some thing which is considered to have consist of some virtue i.e. fad diet, exercise etc. The benefit of something considered as fad may not have been scientifically verified or it may lack the rational proof.

A craze is a product, idea, cultural movement, propensity or model that gains popularity among a small section of the populace then quickly migrates to the mainstream. Crazes are characterized by their lightning fast adoption and swift departure from public awareness. Being of temporary nature is one of the major characteristics of craze. Crazes and fads are also characterized by their unusually high interest and sales figures relative to the time they are active in the marketplace, as compared with other similar products, ideas, cultural movements or models.

From Wikipedia under the GNU Free Documentation License
Thu Jan 28 12:17:49 2010

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From Yahoo Image Search: "Fads"
Tue Jan 5 17:55:13 2010

The Invisible Edge: Fads That Never Caught On #5
theinvisibleedge.blogspot.com
The Invisible Edge: Fads That Never Caught On #5

Greg

Fri, 20 Nov 2009 18:19:01 GM

Adventures in Advertising (16); Adventures in Driving (5); Beach Bums (8); Childhood (12); Douglas Sirk's Underbelly (7); . Fads. That Never Caught On (5); Fill 'er up (3); Halloween Back in the Day (6); In the Mythical Land of Lesbians (5 ...

Using the Power of Social Media for Business Growth
spinsucks.com
Using the Power of Social Media for Business Growth

Arment Dietrich

Mon, 23 Nov 2009 15:58:02 GM

In honor of the holiday this week, I am going to post articles I've written for other publications in order to thank them for their support and drive traffic to their sites. Today is from AllBusiness.com​ (with a few changes made from ...

Guiding your child through the ads and fads - Kirkland Reporter
pnwlocalnews.com
Guiding your child through the ads and fads - Kirkland Reporter

unknown

Fri, 20 Nov 2009 23:08:47 GM

Guiding your child through the ads and . fads. . Nov 02 2009. From steroid-using athletes to celebrities who bounce between clubs and rehab, today's role models can leave a lot to be desired. It seems the greater the fall, the greater the ...

From Google Blog Search: "Fads"
Mon Dec 21 14:45:42 2009

Look further than the fads and fashions of geopolitics - Financial Times
news.google.com
Look further than the fads and fashions of geopolitics

Financial Times

It has weathered well the fads and fashions since. A study published last month by Britain's Ministry of Defence (spooks and the military pay close ...



and more »
Beating social standards - SHSU Houstonian Online
news.google.com
Beating social standards

SHSU Houstonian Online

But part of me can not help but wonder if in our attempts to be viewed as independent, we are merely creating fads . Fads which eventually catch on and ...
What the Fashionable Palate is Wearing - Huffington Post (blog)
news.google.com
What the Fashionable Palate is Wearing

Huffington Post (blog)

Chef Grant Achatz blogged recently for the New York Times Diner's Journal - "People often ask me if the style of cooking he pioneered is a trend, fad or ...

From Google News Search: "Fads"
Sun Mar 7 13:20:59 2010

What were the latest dance fads in this decade?
Q. I would like to know if there are any great dance fads that were popular in this decade, the 2000s (or the early 21st century). You know, like the Hustle in the '70s or the Macarena in the '90s. What were the dance fads of today?
Asked by Erik G - Sun Feb 22 20:20:21 2009 - - 3 Answers - 0 Comments

A. the pop lock it drop it one two step soulja boy
Answered by Jfoe - Sun Feb 22 20:51:05 2009

Now that the teabag party fad is all but over, how does it compare to other past fads?
Q. While the teabag parties certainly did not have the longevity of past crazes such as slap bracelets, koosh balls, Tamagotchi and Sudoku, they inspired a passion among their fans, 'teabaggers,' similar to that seen during the Pokemon, pogs, Tickle-Me-Elmo and Beanie Baby fads. As the nation moves on to a new 'flavor of the month,' where do the teabag rallies rank when compared to other fads of the past?
Asked by Culture Warrior - Fri Sep 25 10:13:47 2009 - - 12 Answers - 0 Comments

A. It is just a new name for the "America held hostage" crowd from the 90's. They will fade into obscurity when a republican is in the white house. They will ignore his rampant spending and the next time a democrat gets elected there will be a resurgence under some new guise. They just do what their pundits command basically.
Answered by Tenchiro - Fri Sep 25 10:22:51 2009

What were the fads as a teen in the 1970s?
Q. What bands/music was most popular? How did you listen to the music? Were there any major brands (fashion-wise)? Were there any toys, gadgets, etc that came around that time that were instantly popular? Basically, I'm after a quick run down of popular culture in the 1970s. Huge thanks in advance.
Asked by lilacflower - Mon Oct 26 03:01:58 2009 - - 2 Answers - 0 Comments

A. The Beatles and the Rolling Stones were probably the most popular bands. Other big bands included Steely Dan, Lynyrd Skynyrd, The Allman Brothers, Linda Ronstadt, The Eagles, Elton John, Led Zeppelin. Music at that time was still mostly listened to on albums and radio. AM music stations, which have since virtually disappeared because they have poor sound quality, were very popular at that time. Hair was still generally worn long, sixties style. Bell bottoms also were still popular. One fad of the 70s I remember was platform shoes, with soles 3 or 4 inches thick from the toe to the heel. Some popular brands of the time were Tower Records, The Gap, and Atari. This was before chains really dominated the environment, so there were far… [cont.]
Answered by A M Frantz - Mon Oct 26 04:14:16 2009

From Yahoo Answer Search: "Fads"
Tue Feb 16 14:37:32 2010