The action of pulling the pin on a grenade and sticking it up a girl's cooch, especially if she's pregnant, thereby aborting the baby (and her, but that's besides the point).
"Yo did you hear about Stacy? I heard she got a grenade abortion."
"Bullshit, who would knock her up in the first place?"
"Bullshit, who would knock her up in the first place?"
by SurrealArt April 17, 2016
by Jeramald Peach June 07, 2006