"look at that bitch"
"i wanna stick it in her butt and pee!(SIIhBAP)"

phone: why don’t you go to sleep tommy it’s 2 in the morning?
tommy:why don’t you die you dumbazz

Despite the GTF spamming this definition, they did not invent it as admitted by the first member to use it at the GTF and it's also pretty much guaranteed not to have originated at the bmxboard.com. Neither site should be trying to use this definition to boost their user count. If they continue to, then SIIHBAP them.

feltch bomb:
"dude last night i got with a big black girl!"

bignosewhipper:
"you better have SIIHBAP'd!"

"What does SIIHBAP mean?"
"Stick It In Her Butt And Pee."