When
somebody takes a nasty shit and does not wipe properly causing some
fecal matter to decorate their underwear. They leave a trail
mix of poop in their underwear.
Billy: Dude I just shit and I feel like there is some residue in my boxers.
Harry: you must wipe better so you dont have trail mix in your boxers.
Billy: Thanks for the tip. I will wipe better so I do not have trail mix in my boxers next
time after I poop.