squawker
nounEtymology From squawk + -er.
1
Something that squawks.
2
A person who complains or protests noisily.
- The bosses grow weary of the scammers and squawkers and conclude that they're all a big nuisance.2001, Max Rubin, Comp City: A Guide to Free Casino Vacations, page 185:
3
Slang An informant; a stool pigeon.
4
A loudspeaker used for frequencies intermediate between those of a woofer and a tweeter.
5
Slang The radio used in police vehicles to keep in contact with headquarters.