1. Slang One that depresses, frustrates, or disappoints: Getting stranded at the airport was a real bummer.
2. Slang An adverse reaction to a hallucinogenic drug.
a. A loafer or idler.
b. A beggar.
[From BUM1, adjective. Sense 3, probably from German Bummler, loafer, from bummeln, to loaf.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.