Merry F#%$in' Christmas is a 2004 comedy album released by actor/comedian Denis Leary. It runs for 20 minutes and includes unreleased sessions recorded for his previous 1997 album Lock 'n Load and two tracks previously released on that album ("Deaf Mute Cocktail Party" and "Insane Cowboy (In Africa)").

Since the holiday season of 2005, Comedy Central has periodically aired Denis Leary's Merry F#%$in' Christmas, an hour-long (with commercials) Christmas special featuring Leary and several celebrity guests, including Charlie Murphy, Carmen Electra, William Shatner, and the Barenaked Ladies. The song "Merry F#%$in' Christmas" is the title theme of the special, set to a parody of Rankin/Bass' signature "Animagic" stop-motion animation; no other tracks from the album appear in the special (though the cast performs a new live version of the title theme).