Angry, fed up, annoyed, as in I'm cheesed off about watering their plants twice a week. This term was originally military slang and sometimes put simply as cheesed. [Slang; mid-1900s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Company. All rights reserved.