English

Definition of two-timer noun from the Oxford Advanced Learner's Dictionary

 

two-timer

 noun
noun
BrE BrE//ˈtuː taɪmə(r)//
 
; NAmE NAmE//ˈtuː taɪmər//
 
(informal)
 
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a person who is not faithful to the person they are having a relationship with, especially a sexual one, by having a secret relationship with somebody else at the same time