Another term for masturbating. Coined by the late comedian Robert Schimmel in a satirical song he wrote called the "jack shack".
Mom: Willy!
Willy: Yea?
Mom: You're not pumping the pickle in there, are you?
Willy (in panic): Uh, um, no. I'm pooping.
Mom: Oh, okay.
Willy: Yea?
Mom: You're not pumping the pickle in there, are you?
Willy (in panic): Uh, um, no. I'm pooping.
Mom: Oh, okay.
by Stitzie November 1, 2010