Someone who has a secret plan or someone who has extreme frizzy hair.
AK: OMG, look at that dudes hair!!

Smella: Oh god, hes a right onk
by ONKIFIED January 24, 2009
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the sound that a mammoth makes.
Genna-moo.
Meghan-Rawr.
Allie-Onk!
by omgxaxmommoth October 18, 2010
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A sound roughly said like the noise a goose makes.

used when you have nothing else to say, usually a negative reply. see reh
"so did u see jacob tonight or what?" -"onk......maybe" =l

"dude ur not cool..". -"onk"
by JATZ May 29, 2004
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Interjection used to describe an incorrect assumption or wrong answer
Yo, he be muggin at me thinkin he'll take my bitch? I was all "onk", ain't happenin.
by Roob August 19, 2003
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someone who either acts like a pig or someone who has a little secret plan up their sleeve or someone who is keeping a secret... shhh......
Ella: she looks like she is keeping a secret... and she is being such a pig!

Lucy: yh... she does, she is such an onk
by eeerrrrrr smella??? January 23, 2009
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slang word for fart or break wind
Have you just onked? I think I am gonna onk. It stinks in here someone has just onked.
by Al Castle September 22, 2007
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When i women gives a man a blow job and begins to make an onking sound as the guys cock is in her mouth.
"she was giving my the angry onk"
by Cynthiasquirter February 02, 2009
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