1 definition by The_Undertaker

SIIHBAP

A term that means Stick It In Her Butt And Pee. The origin of the phrase is unknown.

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.

by The_Undertaker May 4, 2008