SpongeBob GangstaPants Share definition Flag 1) A straight-up gangsta sponge ain't afraid to pop a cap in yo ass.2) A sponge straight outta Compton. Dayum! That sponge is GANGSTA!Yeah, he's Spongebob GangstaPants! SpongeBob GangstaPants by DD323 March 10, 2011 Get the SpongeBob GangstaPants mug.