Truculent Harry Plopper

A particularly difficult bowel movement.

James came out of the bathroom after 30 minutes wiping the sweat from his brow, and when asked what took so long, he replied, "Had myself a truculent Harry Plopper!"

Wanderlust script, Episode 1:

We were going to Dublin, visit some friends, we're on the plane, and he says he needs to piss and he's gone for what feels like an eternity.
So I'm thinking, you know, either he's working his way through a particularly truculent Harry Plopper.