Monkey bomb
A sexual maneuver in which the pitcher covers his penis in carefully molded C4 then approaches the catcher and drops his pants. When the catcher, unaware of the preparation, gets down to blow the pitcher, the pitcher detonates the C4.
"So what're your plans for tonight?"
"I'm gonna give Becky the monkey bomb."
"The what?"
"Well, you know, when you get the C4, and you--"
"I believe that's called guro."