downtown cherry pie
When engaging in anal sex, the girl has her period, resulting in blood mixed with semen covering the bed. This is what is know as a Downtown Cherry Pie.
Luke: Oh shit, wtf is all this blood on the bed?
Eric: Jane had a Downtown Cherry Pie last night .
Luke: On my fucking bed!?
Eric: Jane had a Downtown Cherry Pie last night .
Luke: On my fucking bed!?