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.
Wishology! 'The Exciting Middle Part' - S7-E2
Continuity mistake: Timmy and Mark are swimming through the sewer to escape the Chester and AJ impostors and escape through the top. When they land outside of it, onto Timmy's front yard, they are completely dry.
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.