A fast slang term that someone (usually an inferior primate, babwa, bab, baboon or askhole) may use to abbreviate the following sentence: "go on stick it in!"
Babwa's girlfriend says to him "ohh Babwa! gwanstickitin!!"... moments before he inserts his 2inch penis into her love canal!!
by Cage cleaner July 30, 2007
Get the gwanstickitinmug.