Squeaker

Origin

squeak + -er("agent")

Full definition of squeaker

Noun

1. One who or that which squeaks.
2. A party toy that uncoils with a squeaking sound when blown
3. (slang) An informer
4. (US) A game or election won by a narrow margin
5. An animal that squeaks.
1. The ().
2. , a frog family.
3. , a catfish genus.