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2.
To get a wank from another person using their mouth.
I can't be bothered fuckin you love, just give us a mouth wank
by jaymcsweeney February 22, 2007
 
1.
An alternative name for a blowjob, or to suck someone off.

This word came about as, when performing oral sex, you neither "blow", or "suck".

It's just a bit of a mouthwank really.
Girl: I enjoyed the movie, and I'm not tired at all!
Boy: Well baby, I'm up for a mouthwank.
Girl: Yaaaaay!

Boy next day....
Boy: So I was wiv my bitch Chardonnay, and she totally mouthwanked me!
Friends: Dat is well gud
by BByank January 06, 2010