NaJeongMoSaJiMiDaChaeTzu is an official alias of Twice. It is comprised of the beginning of every member's name, starting with the oldest, Nayeon and ending with the youngest, Tzuyu. It can also be shortened when describing a subgroup, for example, JeongMiTzu or DaChaeTzu.
Conception[]
At a fan sign event around April of 2016, Dahyun went to clean up in a washroom after the event had ended. When she came out of the room, the entire venue was deserted. She immediately called her manager, who told her they had forgotten about her and the group had left the event without Dahyun. After that episode, Twice began to use NaJeongMoSaJiMiDaChaeTzu to perform attendance. Pretty soon it became one of their slogans, with everything from promotional photos to hair and makeup being done in that order.