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do-gooder

American  
[doo-good-er, -good-] / ˈduˈgʊd ər, -ˌgʊd- /

noun

  1. a well-intentioned but naive and often ineffectual social or political reformer.

do-gooder British  

noun

  1. informal a well-intentioned person, esp a naive or impractical one

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of do-gooder

1925–30, do good + -er 1

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

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