when someone is acting like an animal or a fool.
"Man, will you stop ackin a monkey!!"
by DML67 April 12, 2007
When your chirrens be actin' up out in public. Believed to be indiginous to the southern US.
I watched as the child's momma grabbed him by the hand and shook him wildly screaming "I told you quit ackin' a monkey!"
by Lynnoflyns April 12, 2007