cotton bud
noun🔊/ˈkɒtn bʌd/
🔊/ˈkɑːtn bʌd/
(British English) (also cotton swab North American English, Q-tip™ North American English, British English)
a small stick with cotton wool at each end, used for cleaning inside the ears, etc. （用于清洁耳朵内部等的）棉签