English

Definition of old lag noun from the Oxford Advanced Learner's Dictionary

 

old lag

 noun
noun
BrE BrE//ˌəʊld ˈlæɡ//
 
; NAmE NAmE//ˌoʊld ˈlæɡ//
 
(British English, informal)
 
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a person who has been in prison many times