osamaru

It's a stealthy way of calling someone a masochist. if you read "Osamaru" backwards you get the message "Ur a maso".

Guy 1: Man that crazy girl abuses me everyday!
Guy 2: Why won't you break up with her then?
Guy 1: I still like her though.
Guy 2: Dude I didn't know you were such an osamaru