What does CMAR mean or stand for ?

CMAR is used online as an acronym for CMAR.What does cry me a river mean though?well,its a way of mocking another person who is shedding crocodile tears or dramatically crying.

This usually happens when a guy is telling his girl ” dont CMAR”.When the girl is jsut trying to make guy guilty and in order to gain his sympathy and pity,concotes this ploy.