Tannies is a word used to refer to the seven members of the legendary boy band BTS or Bangtan Sonyeondan. This term belongs to them and them only, anyone else using this term to refer to some other entity is invalid. Don't even try. Also, keep in mind the 's', because Tannie is often used to refer to Kim Taehyung's pomeranian and best boy Yeontan.
Used by K armys first for BTS (tannie~deul) so cute.
If I see any other btch other than army calling thier faves tannies Istg I'll release termites in your home.
a nickname lovingly given to BTS, made after their korean name "bangtan". Now, if I see anyone of you using this name for any of your flop faves expect them to disband the very next second and I will personally visit your house to snap your neck!