One who is an extreme turnoff to girls, causing their vagina to contract as not to let cock come in and play
"Dude I think Lauren wants it!" says Mike
"Only cuntclosers would think that.." says da Jaus
"Dude I hate when you get a boner and then you wanna get out of a pool." says Mike
"So it's okay to have the boner in the pool?" says da Jaus
"Yea, nobody can see it" says Mike
"Only cuntclosers would say that..." says da Jaus
An especially offensive thing to call someone, especially a dude. Technically it refers to the dark clots that sometimes work their way out early in a chick's period. If you don't believe me, ask a chick.