tattletale
noun
Definitions
One who tattles (reports others' wrongdoings), often a child seeking attention.
Synonyms:narcsnitchtattlerwhistle-blowerOne who gossips, often for the sake of attention.
Synonyms:gossiprumourmonger
verb
Definitions
To act as a tattletale; to tell on; to give away, reveal, or expose.
adjective
Definitions
Telltale; giveaway