Definition of dustball noun from the Oxford Advanced Learner's Dictionary

 

dustball

 noun
noun
BrE BrE//ˈdʌstbɔːl//
 
; NAmE NAmE//ˈdʌstbɔːl//
 
(also dust bunny)(North American English)
 
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a mass of dust and small pieces of thread, hair, material, etc.
See the Oxford Advanced American Dictionary entry: dustball