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.
"So I said - like - who does she think she is?"
"I had my head in the toilet - you know - and he jumped me."
"There were plenty of bustybabes on the beach - and whatnot."
"A perfunctory interjection is - like - mind-numbingly irritating."
Girl 1: His way of addressing the problems in their relationship are perfunctory at best.
Girl 2: Jeez girl, ease up on the fancy lingo! We're not Shakespeare here.
Girl 1: You're right, my bad. My point still stands though!