mucker
noun/ˈmʌkə(r)/
/ˈmʌkər/
(British English, informal)- a friend (usually a man's male friend)
- 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’.
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mucker