perfunctory

adjective2

1. •
   Done only or merely to conform to a minimal standard or to fulfill a protocol or presumptive duty.

   • He then poured some wine for me to taste, and harassed me with perfunctory courtesies that had to be acknowledged. — 1976
2. •
   Performed in a careless or indifferent manner as a thing of rote.

   • He did a perfunctory job cleaning his dad's car, finishing quickly but leaving a few spots still dirty.