noun, の adjective
When you discuss something superfluous you aren't being serious, you're telling a joke.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
I have no time to waste on a stupid joke.
Tofugu likes joking on their podcast, but sometimes they get angry emails from people who don't get the jokes.
Stop joking around. Why do you want to go to a French restaurant? We shouldn’t break our pattern. If we’re just going drinking, anywhere is fine, right?