Perfunctory is an adjective, it means to do something without any real interest, effort or feeling. If you do something merely to get it over and done with then that is perfunctory. If it’s something you’ve done that you don’t give a shit about then that’s perfunctory. Indifferent, apathetic, perfunctory, three ways of saying the same thing.

Intelligence agency term for "psychological operation". A government or corporate-sponsored operation, usually taking the form of a "terrorist attack" or "crazed gunman on a spree", with the intent of panicking the public into demanding more police and laws inhibiting freedom. Psyops are usually carried out by drugging a civilian or group of civilians with aggression-promoting drugs, psyching them up, arming them, and sending them out to commit mayhem. Government-sponsored terrorism. See also blackshirts, conspiracy

An action carried out without real interest, feeling, or effort.

A fancier way of saying half-ass. See also #half-ass, #cursory