Flash-Boner
A boner that arises immediately from the presence of a really hot chick or some female body parts on serious display.
"Jessica walked in wearing a thong and a push-up bra and immediately I had a flash-boner."
flash boner
an erection that last under 1 min.
bro 1: dude was that ur mom
bro2: yea
bro1: ok because ur sister just gave me a flash boner.
bro2: yea
bro1: ok because ur sister just gave me a flash boner.