cougar stain

When a woman old enough to be considered a cougar leaves a pussy juice stain on your nuts,sheets,couch,or in your beard.

Tommy still had the cougar stain on his beard when he came to work Monday.

fitness stain

The area of perspiration on an individual's pants/shorts in the butt-crackal or taintal region made visible to the eyes of the surrounding audience; most commonly associated (but not necessarily) with strenuous activities - such as working out.

Hey dude. . . before we go out in public, you gotta do something about that gnarly fitness stain you have goin' on down there! Does that not bother you?

Whiskey Stain

A dent or scratch (obviously self-inflicted by way of an unseen post, parking meter, parked car, barrier....etc.) Usually seen on the rear quarter panel of a pick-up truck and/or car. Driver is likely unaware of his whiskey stain until next morning/afternoon.

"Hey, check out the whiskey stain on the side of Joe's truck"

Freak Stain

... a blemish caused by the activities by a freak who sexually scars a part of their body through their activities.

E.g. herpes, genital warts

Oooooooohhh that Erin bitch has a freak stain on her face.

or

Erin has such a nasty freak stain on her face.

rice stain

asian person.
normally short

hey look over there

at what

that damn rice stain she keeps giving me the eye

snicker stain

same as skid marks... Stain caused by not wiping properly after taking a dump.

My undies got a snicker stain.

cappucino stain

A moustache that looks similar to the one that attempts to grow on prepubescent boys' upper lips.

Women can also have these.

'Dude, my moustache is coming through nicely!'

'Mate that's a cappucino stain at best.'