abbreviation for hate-my-ass-off in either a literal sense in which you despise your ass so much that the donkey will trot off and desert you for greener pastures and a better companion who will not be as verbally or physically abusive as you were....or in a metaphorical sense in which you are basically saying that you are filled with a tremendous amount of loathing for something or someone at the moment right now
Shrek HMAOed his donkey when he said that the donkey was a worthless piece of shit that some fat bitch crapped out of her yeast-infected anus after doing anal with Owen Wilson.
I am so angry that I am HMAOing right now with anger
I am so angry that I am HMAOing right now with anger
by Maxabillion February 9, 2009
by hnnnggghhh April 6, 2011
-Dude, I saw a panda express car, and then it stopped, and chinese people came out of it. -HMAO, are you serious?
by Washingtonsays September 26, 2010