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1.
when a man shits on his partners chest, rubs his dick around in the shit, and inserts his shitty dick into his partner's mouth. shit
Pete Plevs got pleasure out of giving Nancy a 'dirty brown'.
by Bruno Ranjak February 12, 2009
 
2.
Hair that darker then dirty-blonde, but lighter than black and darker then dark brown. Dirty brown
K: what color hair?
C: You know, like Jeff's " dirty brown"
by 3mittens April 02, 2010