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1.
a public charter school that spans from 5th grade to the current highest class of 11th grade. a school with awkwardly young teachers, too much homework, and the kind of lockers you find at a bowling alley. sports teams that are not recognizable by a division, and full of wacky students who skip, frolic and step pop pop down the halls while singing kinky songs....
"i go to iacs."

"oh, no wonder you dont sleep, always have a headache, and never shut up about school"
by nonoelleon October 18, 2009
 
2.
IAC
Indonesian Airborne Calvary

When Indonesia is under attack, they send in their special forces, horses flying out of planes.

Nuff said.
Shelli: Dude this english class is so lame....
Anthony: I know girl... OH SHOOT ITS THAT IAC KID CALLING IN THE BIG GUNS!

Shelli: THIS IS LIKE CHROME ALL OVER AGAIN!
by Dahman316 June 27, 2010
 
3.
An abriviation for "I Am Cute." A term used by net-junkies or as a T-shirt logo for the web comic "Megatokyo."

Generally used by cute, peppy girls who also fancy sayings such as "Too cute to be yours," "Somethin' Sweet" and "Cutie Pie."
Wow! Your shirt says "I.A.C."! Awexome!
You like it? It's my favorite! :)
by Ashen Phoenix May 10, 2006