When a boy takes mayonnaise out of a jar (preferably with the hand) and spreads it in his girl's bum hole. He will then proceed to lick it out of her bum hole.
Dang dude! Last night I gave my girlfriend the best Mainous (may-n-uss) ever!" "did you bring your own mayonnaise?
by Legit-name43 April 15, 2011