Tony Cox ad-libbed the "You probably shouldn't be digging in your ass" line. Director Terry Zwigoff found the line so funny that he admitted to repeatedly cracking up on set and even waking up in the middle of the night laughing.
In his autobiography "The Billy Bob Tapes", Billy Bob Thornton said that if he could go back to any time in his life and relive it, he listed this film, The Alamo (2004) and when he worked for the Arkansas Highway Department in 1979.
The unrated version of the film furthers the record for the most profanities in a Christmas film, including 170 uses of "fuck", 74 uses of "shit", 31 uses of "ass", 10 uses of "bitch", and 1 use of "bastard", in variable forms.
Chamberlain's, the only anchor store that appears in the Saguaro Square Mall, is fictional and never existed. The space used for Chamberlain's was actually Del Amo Fashion Center's former Montgomery Ward store. The store was vacant at the time of the movie's filming. This wing no longer exists, as in 2006, the Montgomery Ward building was demolished along with the entire wing and replaced with the new, open-air Lifestyle Court.
Brett Kelley's character is listed in the credits as "The Kid", even though his name is revealed to be Thurman Merman during the report card scene. Lauren Graham's character is credited as "Sue", but her name is never used in the dialog, even in the director's cut.