n. a t-shirt that you no longer wear, but you keep in your drawer as if you did wear it, and now its primary purpose is to clean up your cum. You can also use it to dry off your girl if she is super wet.
Rosie: Ugh, what do we do now?
Mac: Do you see that old shirt with the puppies on it. Yup, that's the one. That's my cumdershirt. Problem solved.
Mac: Do you see that old shirt with the puppies on it. Yup, that's the one. That's my cumdershirt. Problem solved.
by Juicy Froot January 29, 2016