bumbag

Từ điển Oxford Advanced Learner 8th

bum·bag [bumbag bumbags] BrE [ˈbʌmbæɡ] NAmE [ˈbʌmbæɡ] (BrE) (NAmE ˈfanny pack) noun (informal)
a small bag attached to a belt and worn around the waist, to keep money, etc. in
See also: ↑fanny pack