An informant.
A young pigeon.
The American golden plover.
Anything that makes a squealing noise.
The European swift.
The harlequin duck.
A pig.
A kind of jug used to carry beer having 1 litre or 32 ounce capacity (half the size of a growler).
Any animal or person who squeals.
One who gossips, often for the sake of attention.
One who tattles (reports others' wrongdoings), often a child seeking attention.
To act as a tattletale; to tell on; to give away, reveal, or expose.
telltale; giveaway