Jock Dripper
When a man's underwear becomes wet from sexual excitement after he has view something sexually exciting (say watching porn, or 9 1/2 weeks). The female equivalent is a "Panty Wringer". For underwear in general (male or female) it would be a "Draw Dripper".
Dude, I just watched this porn called "Dyke Bar". It's a real "Jock Dripper".