Natty--I think he just wants confirmation rather than being asked to repeat himself. So perhaps this would be more helpful: there is no such verb ending as まれ. It does not exist. There is a rudish, abrupt way to issue commands, and that differs based on the verb: for U-group verbs, you change the last syallable into an え sound, and for ru-group verbs, you drop the ru and add ろ.
ie, やめる becomes やめろ and
だまる becomes だまれ
You probably saw damare or something and assumed that the まれ portion held a special significance on its own, when in fact it does not.
Also, why try to learn how to say things rudely? If you are angry at someone in Japan, you probably will never use these forms. Unless you are a kid or are ragingly drunk or are imitating anime characters. If its for fun, go ahead, but in terms of language learning, a waste of time, especially at the early stages...