Straining on the toilet to release an over-sized piece of crap causing you to exclaim "wraaaaaauuuugh" (meaning "Mommmmy!" in Kashykk-speak); when the offending fecal matter is finally released and inspected before flushing, it is covered in ripped out butt-hairs.
From the WC: "Wraaaaaauuuuuugh!!!!"
Joe: "Hey, is that Bob in there?"
Betsy: "Oh, yeah, sounds like he is Harboring a Wookie again...maybe he needs a laxative?"