Definition of long tongue in English:

long tongue

noun

  • 1An excessive talkativeness or loquacity; a tendency to speak out of turn or reveal secrets.

  • 2(A nickname for) an excessively talkative or loquacious person, or one prone to speaking out of turn or revealing secrets; a gossip, a ‘blab’.

Origin

Mid 16th century; earliest use found in Thomas North (1535–?1603), translator. From long + tongue.

Pronunciation

long tongue

/ˈlɒŋ tʌŋ/