Adjective meaning very good, awesome, well above par and so on. Most commonly used by rowers who eat far to much sugar and get high on surgical spirit
by Bunnyindahole November 3, 2005

Anonymous person #1: Did you see Jerry impress the boss with his presentation?
Anonymous person #2: Yea, did you see him ace it?
Anonymous person #1: Yea.... lucky bastard
Anonymous person #2: Yea, did you see him ace it?
Anonymous person #1: Yea.... lucky bastard
by Ulupong September 28, 2009

by Unknown827 April 29, 2020

Allied Chat. Used in some online multiplayer games to instruct team-mates to turn on allied chat or to signify that you have turned on allied chat.
ac, ac on, turn on ac.
by K August 11, 2004

by ocelotsixx December 17, 2008

something that is extremely cool or that you are very excited about. sounds very un-ace when said by americans.
by holyroman April 18, 2005
