This is the term for when a girl hooks up with a guy, and then the guy becomes clingy and attached, forgetting that it was just "a good time." It is the combination of the words: Cock and Kukoo. It is used to describe when a man becomes clingy, similar to when a woman becomes clingy it is known as "dickmatized."
As soon as she slept with Ruben, she knew he was going to go cockoo on her. And she was right.
by MrsPeacockColonelMustard May 16, 2011