1 definition by Paras Nuevo Leon
Literally means, "don't stain". but its metaphoric meaning is somewhat like saying "stop kidding" or "are you serious?(rhetorically speaking)"
Ryan: Dude, my girlfriend slapped me in the face before i broke up with her.
Omar: no manches dude.
Ryan: true story.
Omar: no manches dude.
Ryan: true story.
by Paras Nuevo Leon April 28, 2009