A reference to the film series Aliens when the aliens inside the human victims escape from the victim's chest, literally bursting through their clothing and letting the baby alien escape.
Dude 1: Dude stop touching yourself!
Dude 2: Man I have a really bad itch..
(Moments later an alien explodes out of his chest)
Dude 1: Shit! A Shirt Buster!
Dude 2: Man I have a really bad itch..
(Moments later an alien explodes out of his chest)
Dude 1: Shit! A Shirt Buster!
by Dave(thepunkyone) January 15, 2006
Get the Shirt Buster mug.