GD's Mouth Is Cheap? (Please Take Care of My Refrigerator)

Korean Idiom: His/her mouth is cheap(or light)

Please Take Care of My Refrigerator - one of the most popular cooking variety shows in Korea - happily invited two world stars, G- Dragon(GD) and Taeyang(TY) to its studio (August 31, 2015)

TY and GD are entering the studio.

Kim Sung-ju, one of the two hosts in the show, jokingly asked both of them to reveal each others' one weakness. While worrying about his old friend's image(GD and TY have been friends for 16 years), TY said, "GD... his mouth is really cheap."