A fat guy whose sexually excited all the time.
Bobby: Is your boyfriend Billy the boner?
Maj : Huh?
Bobby: Because he's always enthusiastic when it comes to sex.
by whenimaqueen September 2, 2018
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Billy Boner to describe a feeling a redneck gets in their pants when they look at a BIG truck.
Man This is the 3rd time today Billy Bob has a got a Billy Boner after looking at my new truck.
by Redneck Mother Fucker January 23, 2018
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A absolute legend with the aul hurl that gets unlimited bitches and loves lollipops like a true man. A Billy Boner is an absolute sex bomb.
Girl 1: omg is that Billy Boner with his iconic lollipop

Girl 2: OMG Billy Boners are so hot

Both:* swoon*
by Tranny Fanny August 1, 2022
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