Nut Frosty

When you're involving yourself in sexual acts, a male, and your nutsack is as cold as a frosty, thus making foreplay awkward at first. Can occur during winter or after swimming for an extended period.

Dude 1: I was getting freaky with my girl last night, and I had some serious nut frosty goin on.
Dude 2: Bro that really sucks.
Dude 1: Tell me about it man.