A discarded napkin already used by a
bum/
tramp/dero in McDonalds. For it to qualify as a trampkin, you have to use it to clean your hands or mouth by
mistake (or on purpose).
That's not mine... it belonged to that
bum who was sitting across the
table. Gross, you just used a trampkin on your
face!!
Jeez, Heidi, you let me use that stank trampkin without saying anything!