crapper-napper

noun. a foot or leg that falls asleep due to circulation being cut-off from sitting on the toilet for a prolonged period of time; adjective. a numbing or tingling sensation in the foot or leg that is the result of sitting on the toilet for a prolonged period of time

15 minutes later, Joe came limping out of the bathroom, complaining of a crapper-napper.

Ralph got a crapper-napper from sitting on the toilet.