mad courtesy - when you say something is cool, but you're actually mad and

when you say something is cool, but you're actually mad and just trying to cover it up.

You: That party was mad courtesy. I just don’t want to talk about the time I peed in the pool.

Text from your friend: That test was mad courtesy. I still failed it, though.

DM from your teacher: Your essay was mad courtesy. I still gave you a C.