To uppercut someone wearing a hoodie from behind, causing the hood to turn inside out. The resulting "fin" is flattened, and stood up straight.
by K Stizzokes December 12, 2006

A shark attack is between a man and a woman, when they are watching a movie or some sort of other entertainment. during this entertainment the two shark specimens engage in some sort of sexual activity, the male shark attacks the female shark thus making the female shark moan.hence, resulting in a successful shark attack.
girl shark: OOOHHHHH!;D
girl shark: OOOHHHHH!;D
girlfriend: deengg baby, that was an amazing shark attack last night, lets have another real soon!=
boyfriend: ah yesss, anytime:
boyfriend: ah yesss, anytime:
by ah yesss, im an unknown March 18, 2009

The moment when a show is no longer worth watching due to a very contrived episode. The term comes from the Happy Days Hawaii miniseries.
When did Voyager jump the shark?
A. Seven of Nine
B. The Year of Hell
C. Chakotay's vision quests
D. Day one
A. Seven of Nine
B. The Year of Hell
C. Chakotay's vision quests
D. Day one
by Xyzzy May 4, 2005

by Ethan McCarthy April 20, 2007

by Celeste February 28, 2005

A reverse reversal of fortune.
When a company or, oh, say a TV sitcom (aka Happy Days), begins a downward spiral, the moment that the spiral began they are said to have "jumped the shark". However, if by intelligence or more likely pure chance, said company or sitcom turns the downward spiral around and all of a sudden they are in the black or renewed for another season, they have "humped the shark". Okay, what it means is Fonzie jumped the shark and then turned around and humped the powerful beast and who wouldn't renew a show that had the cojones to do that in the '70s?
When a company or, oh, say a TV sitcom (aka Happy Days), begins a downward spiral, the moment that the spiral began they are said to have "jumped the shark". However, if by intelligence or more likely pure chance, said company or sitcom turns the downward spiral around and all of a sudden they are in the black or renewed for another season, they have "humped the shark". Okay, what it means is Fonzie jumped the shark and then turned around and humped the powerful beast and who wouldn't renew a show that had the cojones to do that in the '70s?
Man, Apple really jumped the shark with Newton back 1993.
Yeah, but they humped the shark when they came up with the iPod. I sure hope they don't jump it again with the iPad.
Yeah, but they humped the shark when they came up with the iPod. I sure hope they don't jump it again with the iPad.
by yowaldo August 6, 2010

When a female partner initiates this behavior, her male companion, donned in rollerskates, places his palms together on top of his head mimicking a shark's fin. He rapidly skates toward her, penetrating her in the rear.
If that girl bends over one more time, I'm gonna ground shark that booty so hard she'll cough up her breakfast.
by liebensaft April 2, 2009
