virtue signalling

Short definition from Wiktionary

Noun

1. 1
   The practice of expressing a particular opinion or performing a particular action in an attempt to make oneself look virtuous: commonly defensively in response to, or anticipation of, criticism; or aggressively, in assuming a moral posture in attacking an opponent.
2. 2
   Alternative form of virtue signalling.

Verb

1. 1
   present participle and gerund of virtue signal