¿Cuándo alguien dice, "¡No manches!", qué significa?
No manches

C_Norita
October 20, 2006

nohablo
October 21, 2006
You may find this discussion from the WordReference forums helpful:
*__http://forum.wordreference.com/showthread.php?t=236844__*

C_Norita
October 21, 2006
Their comments helped me out a lot. I also have heard of "no mames" as it was mentioned, but I thought that it must mean something else. Guess not. From the conversations I hear people having on television and from a Mexican amigo of mine, I always thought "no manches" must mean something like, "Don't be serious!", and I figured it may also mean "Come on!" or "Stop playin'!" like one of them said. I guess I was on the right track after all, eh? ¡YA LO ENTIENDO!
¡¡Muchas Gracias, nohablo!!