When a man's penis migrates from one side to the other, but turn falls thru the opening in the front of his underwear. Resulting in a trap that needs to be adjusted for comfort.
When I was insert activity I caught trap door syndrome mid stride, and was trouser trapped. Luckily the one leg shuffle sorted it out.
by 4BsBestIRL August 22, 2018
Get the trap door syndromemug.