An underdog is a participant in a fight, conflict, or game who is not expected to win.

Underdog may also refer to:

Books Underdog (novel), a 2001 novel by Swedish author Torbjörn Flygt "The Underdog", a Hercule Poirot short story by Agatha Christie in the collection The Adventure of the Christmas Pudding The Underdog (novel), a 1999 children's novel by Markus Zusak Underdogs (anthology), a 2011 omnibus edition of Zusak's first three novels Topdog/Underdog, a 2002 play by Suzan-Lori Parks

Film and TV Film The Underdog (1943 film), an American drama film Underdog (2007 film), a live-action film based on the 1964 TV cartoon series of the same name Underdogs (2013 Argentine film), an animated Argentine football film Underdogs (2013 American film), a high-school American football film Underdog (2018 film), a South Korean animated film Underdog (2021 film), a documentary film The Underdoggs, a 2024 American football film

Television Underdog (TV series), an American animated television show The Underdog Show, a British dog-training show Underdogs (TV series), a Canadian consumer-advocacy show Underdogs, an Irish-language reality show on TG4 "Underdogs" (Friday Night Lights), an episode of the TV series Friday Night Lights "The Underdog", an Agatha Christie's Poirot episode

Music Albums The Underdog (Aaron Watson album), 2015 Underdog (Atlanta Rhythm Section album), 1979 Underdog (Audio Adrenaline album), or the title song Underdog (Brutto album), or the title song The Underdog, an album by Stef Lang The Underdog EP, by Yellowcard, or the title song, "Underdog" The Underdog/El Subestimado, by Tego Calderón Underdogs (album), by the Matthew Good Band Underdogz EP, by the Axe Murder Boyz, or the title song Underdog, an album by Exilia Underdog: Original Soundtrack, the soundtrack album from the film

Songs "Underdog" (Alicia Keys song), 2020 "Underdog" (Ida song), 2013 "Underdog" (Kasabian song), 2009 "Underdog" (You Me at Six song), 2010 "Underdog" (Banks song), 2017 "Underdogs" (song), a 2007 song by Manic Street Preachers "The Underdog" (song), by Spoon "Underdog", by Anastacia, the B-side of "Cowboys & Kisses" "Underdog", by Imagine Dragons from Night Visions "Underdog", by the Jonas Brothers from It's About Time "Underdog", by Lacuna Coil from Shallow Life "Underdog", by Lil Baby and Gunna from Drip Harder "Underdog", by The Lost Trailers "Underdog", by Motionless in White from Infamous "Underdog", by Rock Star Supernova from Rock Star Supernova "Underdog", by the Script from Sunsets & Full Moons "Underdog", by Sly & the Family Stone from A Whole New Thing "Underdog", by Testeagles from Non Comprehendus "Underdog (Save Me)", by Turin Brakes from The Optimist LP "The Underdog", by Reks from Rhythmatic Eternal King Supreme "Underdogs", by Madder Mortem from Red in Tooth and Claw "Underdog", by Green Day from the deluxe edition of Saviors

Other music Underdog Records, a Chicago record label whose releases include Screeching Weasel Underdog, an American hardcore punk band with one release from Revelation Records Underdog Records, a French record label

Other Underdog (advertising character), featured on National Accident Helpline commercials Suzanne Muldowney (born 1952), American performance artist Haifa Underdogs, an American football club in the Israeli Football League Turnspit dog, a breed of dog also known as the Underdog Underdog Productions, an American animation studio FC Underdog Chist, a Belarusian football club based in Chist, Minsk Oblast

See also The Underdogs (disambiguation)