To ruin a good thing. Philadelphia-area slang. Etymology: allegedly originated at a party where a drunk attendee actually stuck his penis into the birthday cake, preventing everyone else from wanting to eat it.
Mary: Honey, my mother is coming to visit this weekend, so you're going to have to cancel your camping trip.

Bob: Well that really cocks the cake!

--

"Dude, don't tell your girlfriend you've been cheating on her. You've got a good thing going, and you're just going to cock the cake!"
by Bendy5 April 1, 2010
Get the Cock the Cake mug.
when you get 10 big guys and and to nut at the same time on a preferably skinny woman.
dang bro, we just had our first 10p cock cake
by sigma penis March 31, 2023
Get the 10P cock cake mug.