Defconn

• Name — Defconn • Birth Name — Yoo Dae-joon • Born — 17 November 1976 • Birthplace — Jeonju, North Jeolla Province, South Korea • Genre — Hip hop, Rap, K-pop • Occupation — * Rapper • composer • host • television personality • actor • Instrument — Vocals • Years Active — 1998-present • Label — SM C&C • Associated Acts — Hyungdon and Daejun

In 2004, Defconn received the Korean Music Award for "Best Hip-Hop Album". His songs are mostly comical, sometimes involving lyrics about sexual attraction and wishing for more popularity. One song of his, though, centered on the Yangju highway incident in which two South Korean girls lost their lives to an American military tank, which sparked anti-American sentiment in South Korea at the time. He is one of the better known underground rappers in South Korea due to his parallel career as an MC.

In 2011, he became the host of MBC Every1's Weekly Idol alongside entertainer and comedian Jeong Hyeong-don, a show which was extended from an original six episode special to a weekly show that continues today. In June 2012, he and Hyungdon formed a hip-hop collaboration called Hyungdon and Daejun. Defconn is a founding member of MBC's I Live Alone, a documentary-style variety program focusing on the real lifestyles of men who live alone. The "Rainbow Club" – a self-designated nickname for the show's hosts – includes both men who are unmarried and men who live alone because their families live overseas. Defconn left the cast in July 2014, citing that he was moving in with his brother and would no longer be living alone. In November 2013, Defconn became a cast member for the third season of KBS2's Happy Sunday segment 2 Days & 1 Night, and he remained so until 2019, when the third season ended.

• Title — Year — Peak chart positions — Sales (DL) — Album • KOR • "Clap" Drunken Tiger with Haha, Defconn, Kim Jong-kook and G1 — 2018 — Drunken Tiger X: Rebirth Of Tiger JK

Variety • Weekly Idol (2011–2018) • 2 Days & 1 Night (2013–2019) • Her Secret Weapon (host with Boom & Jang Su-won) (2014–2015) • Hitmaker (with Jeong Hyeong-don) (2014–2015) • I Live Alone (2013–2014) • Duet Song Festival (2016–2017) • Idol Room (with Jeong Hyeong-don) (2018–2020) • Wanna Play? GG (2019) • Friendly Variety Show (2020–present) • Shutdown Fairy (2021) • I'm SOLO (2021-present) • Chosun Panstar (2021) • Capitalism School (2022) • Accapella (2022) • I'm SOLO: Love Continues (2022-present) / Spin-off • Star Birth (2022); Star maker • Filthy Village (2022) - Host • My Name is Gabriel - Panelist • Delicious Guys (2023–present) - Cast Member • Good Day (2025)

• A Poem a Day as Kim Dae-bang (2018) • Hit the Top as Special Appearance (2017) • The Wind Blows Where You Wish as Yang Goo-byeong (2015) • Mom Is Acting Up as Special Appearance (2012)

Defconn is recorded with the occupation songwriter. Recorded with the occupation comedian. Recorded with the occupation composer. Recorded with the occupation singer. Classed in the genre hip-hop. Recorded as singer, composer, songwriter and comedian. Recorded at birth as 유대준.