Question: What is the meaning of the acronym of the South Korean boy band, U-KISS, who is known for their album named "Bring It Back 2 Old School"?

Context articles: Alexander Lee (entertainer)
U-KISS
Eli Kim
Lee Ki-seop
Stop Girl
Bring It Back 2 Old School
Only One (U-KISS album)
Yeo Hoon-min
Bran New Kiss
Neverland (U-KISS album)

Alexander Lee Eusebio (Korean: 알렉산더; Chinese:亚历山大; born on July 29, 1988 in Hong Kong), known as Alexander or Xander, is a half-Korean, quarter-Portuguese and quarter-Chinese singer, actor and host in South Korea.
 He is a former member of the South Korean boy band U-KISS, and is known to speak 7 languages: English, Korean, Cantonese, Mandarin, Japanese, Spanish, and Portuguese; being fluent in the first four.
 He debuted as an actor through a Channel A drama Immortal Classic (불후의 명작), and later as a movie actor through Singaporean film, "3 Peas In A Pod" in 2013.
 He is currently active as a television host on Arirang TV's #StyleCast 2017 and is also a daily radio host for the Double Date show on tbs eFM.
U-KISS (Korean: 유키스 , Japanese: ユーキス ) is a South Korean boy band formed by NH Media in 2008.
 Their name is an acronym, standing for Ubiquitous Korean International Idol Super Star.
 The group's current lineup is composed of Soohyun, Eli, Kiseop, Hoon and Jun.
Ellison Kyoung-jae Kim (born March 13, 1991), better known by his stage name Eli, is a Korean American singer, rapper and actor.
 He is a member of South Korean boy band U-KISS.
 He is a rapper in the group and is one of the English-speaking members of U-KISS alongside Kevin.
Lee Ki-seop (Korean: 이기섭 ; born January 17, 1991), commonly known as Kiseop, is a South Korean singer, dancer, actor and model.
 He is best known for being a member of South Korean boy group U-KISS formed by NH Media in 2008.
 He joined U-KISS in November 2009.
Stop Girl is the 7th Mini Album by South Korean boy band U-KISS.
 The title track is "Stop Girl" and it is the first album without new member AJ who went on hiatus to Columbia University.
 The music video for "Stop Girl" was released September 19, 2012.
Bring It Back 2 Old School is an album by South Korean boy band U-KISS.
 It is the second mini-album that was released by the entire group minus Lee Kiseop, who joined for the third mini-album "ContiUKiss".
 It reached #20 on Hanteo's Top 25 Music chart.
Only One is an album by South Korean boy band U-KISS.
 The first full-length album by the group, it was released on February 3, 2010.
 It features the lead single "Round and Round (Bingeul Bingeul)".
Yeo Hoon-min (Korean: 여훈민 ; born August 16, 1991), also known by his stage name Hoon, is a South Korean singer and actor.
 He is best known as a member of South Korean boy band U-KISS under NH Media.
 He joined the group in February 2011 after the departure of Alexander Lee Eusebio and Kim Kibum.
 Hoon currently attends Dongguk University, majoring in theatre and film.
Bran New Kiss (Korean: '브랜드 뉴 키스') is the fifth extended play released by South Korean boy band U-KISS.
 It is the first EP to feature new members Hoon and AJ.
Neverland is the second full-length studio album by South Korean boy band U-KISS, released on September 1, 2011.
 It is the first album to feature new members Hoon and AJ.
 The album's lead single, "Someday", was released digitally August 26, 2011.
 The album's second single, "Neverland", was released on September 1, 2011, on Mnet along with the rest of the album.
 The album was released in the Philippines in 2012 under Universal Records (Philippines).