The December 23, 1999 Edition of WCW Thunder is a Professional wrestling television show of World Championship Wrestling's, which took place on December 21, 1999 at the Wicomico Civic Center in Salisbury, Maryland
- Numbers in parentheses indicate the length of the match.
- (c) refers to the champion(s) heading into the match.
- Tag Team Match: PG-13 (JC Ice & Wolfie D) vs. The Varsity Club (Mike Rotunda & Rick Steiner) (w / Kevin Sullivan & Leia Meow) - Double DQ (1:43)
- Singles Match: La Parka vs. Tank Abbott - No Contest (0:54)
- WCW Hardcore Title Match: Norman Smiley (c) defeated Fit Finlay (2:43)
- Tag Team Match: The Harris Brothers (Don Harris & Ron Harris) defeated Curt Hennig & Jeff Jarrett (1:45)
- Singles Match: The Maestro (w / Symphony) defeated Bam Bam Bigelow (1:55)
- Six Man Tag Team Match: Jim Duggan, Kidman & Konnan (w / Eddie Guerrero & Rey Mysterio Jr.) defeated The Revolution (Asya, Dean Malenko & Perry Saturn) (w / Shane Douglas) (4:35)
- Singles Match: The Wall defeated Kevin Nash by DQ (2:12)
- WCW World Heavyweight Title Match: Chris Benoit defeated Bret Hart (c) by DQ (4:54)