Top Definition
Giving a double thumbs up, then using both thumbs as an implement of sexual pleasure on a willing female. i.e. inserting both thumbs up a womans vagina with the intent of providing pleasure to the woman.
I went down on this chick last night and hit her with the Fonz Bomb.

I fonz bombed my girlfriend last night. It was hilarious.
by loudnessbomb August 16, 2010

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