A brown streak is when you pound your lady in the ass and you whip out your dick. You slide it down her back resembling a brown streak.
Man, I fucked that beezy in the ass and left her with a brown streak.. Markin' my territory!!
by Daricok January 11, 2009
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A superhero that can make you shit you pants in one stare.
Oh no! It's Brown Streak Man! The one day I forgot to wear my adult diaper! (shits pants)
by Johnny Crapper January 5, 2017
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