Fake Humor

I was washing dishes as Pinky (8) dried them. We're chatting, and after we've been working for a bit she says "I'm doing a lot of fake humor tonight." "what's fake humor?" I wanted to know. "When you pretend you're having a sense of humor but you aren't really. Like when you say things that aren't funny but you pretend they are and do a fake-y laugh. Like (insert wheezing, fake laughter here)"