A form of chatspeak expressing your sadness of being mean to by an opposing person. Stands for You Are Mean To Me. You, are, and to can also be varied into u, r, and 2. Which is where u, r, 2 are rooted from within the phrase urm2m.
Originated from the Neopets.com community.

Billy - "I hate your guts, you freak!!"
Billay - "OMGOMG IHY MORE!!"
Billy - "You mustn't hate on me, ya playa h8ta!"
Billay "OMG URM2M!!!! ): ): ):"
by Zombiesky June 12, 2008
Get the urm2m mug.