It could be anything. It could be any line or gag from any season of any show in the TD universe. I just want your opinions, here.
My Example: Newf Kids On The Rock, Total Drama World Tour
Courtney: "I am a C.I.T."
Heather: "More like a B-I-T-C-"
Another Example: Not So Happy Campers Part 1
Lindsay: "Communal bathrooms? But I'm not Catholic."
Chris: "Not Communion, Communal."