Euphemism for penis. Think "cock" with an alternate pronunciation.
This girl at camp rode my kayak all summer long.
by 8' Kayak July 25, 2003
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Someone who is so incredibly stupid that their intelligence is comparable to some whomst actually has a form of mental disability.

Can also be shortened to "yak"
Person 1 says something really stupid

Person 2 "Holy shit you are such a fucking kayak"
by Jay Yu March 20, 2017
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The loneliest boat in the sea.
Calling a person a Kayak is calling them a loner.
What a fucking Kayak
Yo Kayak bounce!
by vocabology April 18, 2007
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