perfunctory \pur-FUNGK-tuh-ree\ (adjective) - 1 : Done merely to carry out a duty; performed mechanically or routinely. 2 : Lacking interest, care, or enthusiasm; indifferent.
"His hugs, although expansive and affectionate, did not linger, seemed perfunctory." -- Susan Bordo, 'The Male Body'
Perfunctory derives from Late Latin perfunctorius , from Latin perfungi , to perform fully, to get done with, from per- , through + fungi , to perform.