squealer

noun ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about squealer at Wordnik → Where our words come from →

1. Any animal or person who squeals.
2. An informant.
3. A kind of jug used to carry beer having 1 litre or 32 ounce capacity (half the size of a growler).