Random death match , or as others may know it "RDM" , is when u randomly kill a guy.
example - i walk on the map , bored , then i just kill someone i see.
that right there was from your rdm example and (i walk on the map , bored , then i just kill someone i see.) is not correct english the correct way to put that is ( I walked on the map and i'm bored. Then when i saw someone I just killed them.) Something along those lines.