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Slang for Anorexia Nervosia. Used mainly as an insult for friends who believe they are fat and opt to not buy/eat food.
"Thomas, what are you ordering?"
"Meh. I think I'll get a cruton"
"WTF mate? A cruton? what are you a fatass?"
"Don't call me fat!"
"You are fat you A-rex son of a biotch"
by David A. Sherman March 28, 2008
a person who smokes weed or does drugs and does not hide it.
Person 1: Dude I was so fucking stoned yesterday.
Person 2: Wow man, your such an Arex.
Person 3: Seriously, I don't give a shit if you do weed 4 times an hour.
by sympathetiC LegacY December 18, 2009