RichThesaurus
blow the whistle on someone
blow the whistle on someone
synonyms
grass (on someone)
finger someone
shop someone
sing
tell tales (on someone)
pimp on someone
rat someone out
inform (on someone)
put the finger on someone
peach (on someone)
snitch (on someone)
rat on someone
drop a dime on someone
drop the dime on someone
fink on someone
squeal
sell someone down the river
blow the whistle on someone
antonyms