elmeromero

Hi Mike. The phrase you're looking for is "no manches", or literally, "don't stain". It's a cleaner version of the summarily Mexican phrase "no mames", or literally, "don't suck tit." Both mean "don't f*ck around," "don't be a jerkoff," "holy sh*t!", "pull your head out of your ass," "get outta here!," etc. Basically, exclamations of incredulity.