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1.
One of the very imaginative ways of designating semen.

Although several older examples can be found on the internet in chat-rooms or forums, it's become more popular since an amusing picture of a defective neon sign was posted on several satirical websites.

The original neon sign read "Babcock Frozen Yogurt". Due to defective neons, it reads "Cock Yogurt" in a very clear, lit-up and hilarious manner.
"Kathy's a dear, but I think she's got an addiction. After her first serving, she kept yanking the dispenser for more cock yogurt."

"Don't you love to take a nice little asshole and fill it with cock yogurt?"

"Can't have real Boston pancakes without cock yogurt to top it off!"

"Rebbecca chocked on Steve's cock yogurt last night"
by Ulvain December 27, 2007
 
2.
sperm; the liquid secreted by the male reproductive organs. Otherwise know as semen or jizz.

Peter:"So before I was done, I asked her if she was hungry, she siad yes so I gave her a mouth full of my cock yogurt.
Ben: "nice one dude"
by Peter Murray December 27, 2007
 
3.
Another name for Semen.
"So the other night I pulled out on my wife and sent my cock yogurt all over her face."
by Ryan02005 January 01, 2008