Cum Doily
When your having a cheeky wank at your grandparent's house and you need something to catch the load so you grab a designated doily to do the dirty work.
"Quick Nan, pass the Cum Doily!"
Cum shelf doilie
The decorative pattern of tattoos on the back of a female just above the buttocks, Since the 1980's more commonly referred to as tramp stamps.
He completely covered her cum shelf doilie with his load.