a slang term for a good or best friend, home boy, partner, pal, buddy, etc.
Officer Mitchell- "Did that guy just drop a dime on your bunkie?"
Martin Todd- "Yeah, but it's cool, he's my ace boon koon."
by scott bradford 19 April 29, 2010
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1. Someone that you ice cold chill with
2. My nigga
Me and the nigga there go way back he is my ace boon coon
by GQDreAmeR January 13, 2005
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Your dawg, homeboy, homegirl. Someone who your mad cool with.
Where you been girl? We used to be ace boon coon!
by Regina Holcombe January 25, 2009
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noun phrase

A very good friend; best friend (Black to black and male to male)
I like the guy, but he's not what you would call my ace boon coon
by P.M.V. October 12, 2014
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That one side chick that u like and chills with
"Who you on the phone with?" "Ace Boon Goon".
by Blessing20277char February 5, 2017
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