a korean hip hop group of 7 boys named also BTS or bangtan boys, consist of a Princess( Jin ), guy without Jam ( Jimin ), a kokkie ( Jungkook ) , a sweg guy ( Suga ) , an alien ( V ) , a horse ( J-hope ) , a monster ( Rap monster ) works under BIGHIT entertainment
J- hey did you see bangtan sonyeondan new MV
H- OMG yeah!! BTS are so creative
J- i love bangtan boys
by Tae Ha December 27, 2015
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Bangtan Sonyeondan stands for SEXIEST AND MOST BEAUTIFUL BEINGS ON EARTH THEIR VOICES ARE BOOTYFUL
Bangtan Sonyeondan is very good at singing
by BTS_Bunny_Fangurl January 31, 2019
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The bulletproof form of friendship,trust,support and love shared by all seven members in Bangtan Boys (a.k.a. BTS,방탄소년단, Bangtan Sonyeondan). The goals, interest, experience, and feelings that is shared between the members that creates a bulletproof connection between them.

The word 'bangtan" is the romanization of the Korean word "방탄", which means bullet proof.
"There has been an instant bangtan bond between the members from the day they met".
"Each member survived on the other's strength and love forging a bangtan bond that is truly unique".
by BTSOT7 April 24, 2015
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An international boy band that has seven members:
Namjoon:leader,pink monster,dance monster,the man that breaks everything

Jin: The Princess, Mr.Cooksalot
J-Hope: The amazing dance master, flute nose, is everyone's hope
Suga (Agustd): The cranky old man, Mr.Sleepsalot,Nof so sweet
Jimin: ChimChim, Mochi, our serendipity, our short man baby

V: TaeTae, 4D Alien, the reason we live,

Jungkook: Our savoir , Kookie, Our little bunny, The Golden Maknae
Bangtan Boys are the bomb.com.
by sweet_babechick_notgay January 17, 2019
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When you are only attracted to BTS or people who look like BTS

(No matter gender identity)
(This is also a joke, lol)
by namjoonismythiccdaddy August 26, 2020
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1) the effect of Kpop group Bangtan Seonyeongdan to anyone especially to those in the music industry.

2) see more detailed explanation over at aminoapps. Google it gurl.
Example :

1) BTS retweeted X's music (may or may not be popular in the whole world) > people search for it > increase in popularity + people will discover hidden gems Oh my god it is the bangtan effect

2) Heard BTS music > life changes
by Anonfamous August 22, 2018
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When you are first introduced to the K-pop group BTS and are subsequently unable to do anything else. It is similar to catching a virus, because it may start with casual contact but then soon spreads through your entire body and mind. Soon you have gone down a K-hole and are obsessively watching every video, interview, game show, reality show, live, log, and performance they have done in the past, while checking your news feed every morning to see if they have been on Korean TV overnight. It causes you to stop functioning at work and social situations. There is no known cure.
I took a day off of work because I had a terrible case of Bangtan Brain, and needed to stay home and watch every episode of American Hustle Life again.
by AlexArmy April 27, 2019
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