Urban Dictionary: protein stain

Spermatozoa that has dried on a fabric or carpet or anything else.

"Damn when my wife sees all the protein stains on our new bed she'll know I've been fuckin' around'

by WILFONG June 11, 2003

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Something that does NOT come out with just shampoo. Very sticky, irritating, but not flammable

Hey harry, this protein stain tastes nothing like caviar!!!

by Zack Morris February 23, 2005

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stains caused by ejaculation

i went to a hotel and there were protein stains on the sheets... disgusting

by mr happy January 05, 2004

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