drive a moose

To drive a moose is to take a dump, but then drive it up someone else's ass, so they can punch a moose later on.

To punch a moose is to take a shit. My friend was constipated, so after I punched a moose, I took my shit and drove it up their ass. This is called to drive a moose. A few minutes later, they were successfully able to unload their bowels and later that night, they gratefully thanked me in private.