performed merely as a routine duty; hasty and superficial: perfunctory courtesy.
2.
lacking interest, care, or enthusiasm; indifferent or apathetic: In his lectures he reveals himself to be merely a perfunctory speaker.
Origin: 1575–85; < Late Latinperfūnctōrius negligent, superficial, derivative of perfungī to do one's job, be done, equivalent to per-per- + fung-, base of fungī to perform, function + -tōrius-tory1
1581, from L.L. perfunctorius "careless, negligent," lit. "like one who wishes to get through a thing," from L. perfungus, pp. of perfungi "discharge, get through," from per- "through" + fungi "perform" (see function).