The Boss of Me/He Poofs, He Scores! - S7-E14
Other mistake: In "The Boss Of Me", when the indestructible pencil appears, as it slowly rotates, the name "everleady" is already written in red on the side. Then Timmy's dad says "I'll call it the Everleady" as if he's created the name.
Answer: It's a joke. One cannot list all forms of entertainment. The list would never end. The boys were trying to convey how superior they were to the others, by saying that they were too good for comedy.