1. To sadden one or cause one to feel disappointed. In this usage, a noun or pronoun can be used between "bum" and "out." I can't watch the news because it always bums me out. Todd just heard that he didn't get the job, and he's really bummed out.
2. To annoy. My parents were really bummed out when they heard from the principal that I had cut class.
3. To do something badly. I guess I bummed out on the interview because I didn't get the job.
4. To have an unpleasant experience with a recreational drug. I don't take that drug anymore because I really bummed out the last time.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
bum someone out
Sl. to disappoint someone. This menial job really bums me out. The bad movie bummed out the entire audience.
Sl. to have a bad experience. (Originally referred to a bad experience with drugs.) Are you going to bum out again tonight? Man, is he bummed out!
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
1. Depress, sadden, dispirit, as in He's been really bummed out since his girlfriend moved to California. [Slang; late 1960s]
2. Annoy, irritate, vex, as in That haircut will really bum out his parents. [Slang; c. 1970]
3. Fail badly, as in I got through the midterm, but I bummed out totally on the final exam. This usage is student slang. [Late 1960s]
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. in. to have a bad experience with drugs. (Drugs.) I bummed out on angel dust.
2. in. to have any bad experience. The test was horrible. I bummed out, for sure.
bum someone out
tv. to discourage someone. (see also bummed (out).) The failure of his tires bummed out the race driver.
mod. discouraged; depressed. I feel so bummed. I think I need a nice hot bath.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.