Random Episodes
T.M.I.
Cartman throws a fit when the boy's penis sizes are posted on the school bulletin board, He is sent to anger management therapy. 
My Future Self and Me
When a 32 year old man claiming to be Stan from the future shows up in South Park, young Stan is forced to come to terms with the loser he will become. Meanwhile, South Park's own little entrepreneur,... 
Super Fun Time
While the kids are on an educational field trip to a living museum, Cartman makes Butters sneak away from the class to go to the amusement center located next door. Search Episodes
If you're looking for an episode but cant remember which season it's in but can remember part of the title use this.
Short searches like "cartman" usually yield best results.
