The Collaborative International Dictionary of English v.0.48:

Talebearing \Tale"bear`ing\, a.
   Telling tales officiously.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Talebearing \Tale"bear`ing\, n.
   The act of informing officiously; communication of secrets,
   scandal, etc., maliciously.
   [1913 Webster]

WordNet (r) 3.0 (2006):

talebearing
    adj 1: prone to communicate confidential information [syn:
           blabbermouthed, leaky, talebearing(a),
           tattling(a)]