Biz Idiom of the Day- "get up on the wrong side of the bed" get up on the wrong side of the bed Definition: To be in a bad mood; to be grumpy or unpleasant for no apparent reason. Example: 1) Stephan, you sure are irritable today - did you get up on the wrong side of the bed this morning? 2) I feel awful. I must have gotten up on the wrong side of the bed this morning. On second thought, maybe it was all that champagne I drank last night! Etymology: The phrase refers to someone being in a bad mood from the moment they wake up. http://www.peakenglish.com/slang/dailybiz.jsp