bum out


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]

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The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.