no manches
Spanish
Etymology
From no (“negation”) and manchar (“to stain”), conjugated as a command for tú (“you (informal, singular)”). Literally, don't stain or don't ruin.
Phrase
- (Mexico, informal) don't screw around, stop joking, stop being silly
- ¡No manches! ― Shut up! Are you kidding? Stop being an idiot!