The act of jumping up and bumping chests with someone else.

It is very Gangsta fresh.
Yo' home skillet come here and give me one of a good ol' willi vanilli before you go back home.

HECK YES SON!
by Not BrieAnna May 1, 2011
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The act of jumping up and bumping your chest against another chest in an act of joy or pure thug.
Samson got a strike on Wii golf so he walked up to JimJim and willi vanilli'ed him in pure joy.
by i am actually a walrus May 3, 2011
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The best beer in the entire world. Its a vanilla orgasm in your mouth that lingers and brings you consistent pleasure. You will never experience a beer like this. If this beer was an animal dick, it would be that of a cat's, because it ruins all other beers for you just as a cats dick ruins you for all the other cats.
Person 1: Have you tried the Willy Vanilly?

Person 2: Ohh god! Oh fuck! OHHHHHH!!! UH!
by Kylerbizzle July 28, 2013
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The Willy Vanilly is a sex act in which at some point while going at it you slip away and allow someone else to finish the job. When it’s over you flip the lights on and reveal it wasn’t you
Yo I was baggin Jessie last night, pulled the ol Willy Vanilly and jumped out the closet yellinYOU GOT AIDS BITCH”
by Swilderbeast May 14, 2021
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