Randy's dad still lives with the family, but his mom is dead, as Marvin Marsh got it on with Grandmama Vladchick back in season 4. Where's Sharon's mom?
We now know that Darryl Weathers works at an automotive plant near South Park after being unemployed in "Goobacks."
The clerk at Sur la Table is making fun of Steve Martin's portrayal of Inspector Clouseau in the Pink Panther movies.
"Don't you fratenize me!" - Cartman meant "patronize" there.
The Margaritaville® Frozen Concoction™ Maker does exist and is sold at both Bed Bath & Beyond and Sur la Table.
Cartman mentions GTA4 the first time, then correctly mentions GTA: Chinatown Wars the rest of the time.
Judas got 30 pieces of silver for betraying Jesus. You can find GTA: Chinatown Wars for $30 online. :)