dubadu wari wari

Dubadu wari wari is a phrase from the song "MOA diary" by TXT. It's a fan song.

The members said that if you are them in public go and say dubadu wari wari to them and they'll buy you coffee.

Person 1: have you heard TXT's b-sides?
Person 2: yes, MOA diary ( Dubadu wari wari ) is my favourite