mocking

Imitating, esp. in derision, or so as to cause derision; mimicking; derisive.

Mocking thrush (Zoöl.), any species of the genus Harporhynchus, as the brown thrush (H. rufus). -- Mocking wren (Zoöl.), any American wren of the genus Thryothorus, esp. T. Ludovicianus.

adjective

Contemptuous or ironic in manner or wit: derisive, jeering, sarcastic, satiric, satirical, scoffing, sneering. See laughter, respect/contempt/standing.

The adjective has 2 meanings:

Meaning #1: abusing vocally; expressing contempt or ridicule
  Synonyms: derisive, gibelike, jeering, taunting

Meaning #2: playfully vexing (especially by ridicule)
  Synonyms: teasing, quizzical