To fog ones nuts is when a girl (or
guy) makes it very clear that they are ready willing and able to get sexual with a guy upon the guy's OK.
Most common with ex-girlfriends or
girls interested in a guy that in a relationship and not inclined to cheating.
In much the same way that you fog a mirror by holding it close to your mouth, a
person who is fogging your nuts stays close in the event that you agree to sex.
Man, ever since
Tom broke up with
Susie, she's been fogging his nuts every day. If he breaks down and has sex with her, she'll rope him back into all her drama.
Man, this
chick checks fogging my nuts, I'm not gonna be able to turn her down any longer.