meaning of perfunctory
1.  Done merely to get rid of a duty; performed mechanically and as a thing of rote; done in a careless and superficial manner; characterized by indifference; as, perfunctory admonitions. 
2.  Hence: Mechanical; indifferent; listless; careless. 
3.  hasty and without attention to detail; not thorough; "a casual or cursory inspection failed to reveal the houses structural flaws"; "a passing glance"; "perfunctory 
						">courtesy"
						 
