1 definition by sleep =D

(grown ass-man) what an immature male may inadvertently, though accurately call himself when others question his ability to do anything. The Ass-man is a cross between the donkey, popularly believed to be a stubborn and unreasoning animal, and a human being.
"Are you sure you can move that bed downstairs by yourself?"
"What do you mean 'am I sure?' I'm a grown ass man!"

1/2 an hour later...
"MY BACK!!!"
"Are you alright?"
*gritting his teeth through the pain* "I'm fine. Don't say it."
"Say what? I told you so?"
by sleep =D May 19, 2012
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