Mercy Cum Share definition Flag Mercy cum is when you cum from a intercourse that isn't really good / you could not find a good video so you settle for less. Man, I gotta tell ya I mercy cummed last night. Your sister's pussy is too wide. Mercy Cum by #Ifuckedtyler's-sister April 24, 2020 0 0 Get merch Get the Mercy Cum mug. Buy Now — $32.95 See more merch