do-gooder

do-gooder

One who is very interested in social reform and helping others. The term is often used pejoratively to suggest that such a person is naïve and their efforts futile. I know you're a do-gooder, but how many people do you really think you'll be able to help on such a small scale?

Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

do-gooder

(ˈdugʊdɚ)

n. a person who is always trying to help others. (Often derogatory.) I don’t consider myself a do-gooder, but I try to help people.

McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.