One who gives incriminating information about others:informant, informer, tattler, tattletale. (Informal) rat, tipster. (Slang) snitch, snitcher, squealer, stoolie, stool pigeon. See knowledge, law verb (Informal)
To give incriminating information about others, especially to the authorities:inform, talk, tattle, tip3 (off). (Slang) rat, sing, snitch, squeal, stool. Idiom: blow the whistle. See knowledge, law phrasal verb fink out(Slang)
To abandon a former position or commitment:back down (or out), renege, retreat. (Slang) cop out. See resist Roget's II The New Thesaurus Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.