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



BrE BrE//ˈmʌkə(r)//
; NAmE NAmE//ˈmʌkər//
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(British English, informal) used when talking to or about a friend to refer to them It's my old mucker John! Word Originlate 19th cent.: from muck + -er; sense (1) probably from the phrase muck in. Sense (2) is probably from German Mucker ‘sulky person’.