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1.
Noun: Semen
I was on my way into the peep-show booth, when I slipped over and landed face-first in a pool of cock-yoghurt.

They really ought to have a cleaner in there between occupants.
by Tommo February 24, 2004
 
2.
The white stuff that comes out of a mans penis.

Cum
Deb: "So what happened last night?"

Jess: "I got Kens cock yoghurt stuck up my nose last night, i fell asleep so its all dry now, i thought i had white bogies"
by Gemmarrrrrr August 24, 2008