Designated Villain: Jean never actually does anything villainous whatsoever. in fact he's one of the nicest characters in the movie, and we're only supposed to root against him because he's Ricky's rival in NASCAR.
In fairness that's probably why he and Ricky seem to develop a mutual respect for each other by the end of the movie.
Fridge Brilliance: When Reese tapes a kilo of Colombian bam-bam under Ricky's car (actually a bag of Lucky Charms cereal). What do some call the "War on Drugs"? Prohibition II. How did NASCAR get started? Running moonshine in Prohibition I. Ferrel and the filmmakers were explicitly calling bullshit on the War on Drugs!
Fridge Horror: While Granny is making Walker and Texas Ranger do community service, she asks "How many times are you going to throw me the radio when I'm in the bathtub?" Throwing electronics into a bathtub while someone in it can easily kill them.
Which means it's a damn good thing Ricky's mom whipped them into shape when she did. Without her giving them some much-needed discipline, it's very likely those two could have actually grown up to be full-on criminals.
Hilarious in Hindsight: Ricky Bobby's downfall and subsequent effort to rebuild his driving reputation, after Kurt Busch went through a two year stretch like this after he got fired from Penske Racing at the end of the 2011 Sprint Cup season for outbursts. As if to lampshade it, Busch drove Ricky Bobby-based cars at two Talladega races (Ricky's Cougar paint job in May 2012 for Phoenix Racing and a Wonder Bread car in October 2013 for Furniture Row Racing).
Memetic Mutation: "Shake and bake!" In fact it has been heard on actual Sprint Cup drivers' radio communications and also has been used by the TV commentator teams.
And, for a while, "the best PlayStation 3 game on the market." Explanation Early Playstation 3s were bundled with a Blu-Ray disc of the movie.