A person who carries heavy loads or goods, especially a peddler or traveling merchant; also associated with sharp, jagged edges.
From Middle English 'jagger' related to 'jag' (a sharp protrusion); originally referred to someone who transported goods in jags or loads, particularly in northern England.
The word 'jagger' is still used in some English place names and surnames, and Mick Jagger's stage name might play on this image of someone with sharp, edgy presence—early medieval jaggers would've been tough, road-worn characters.
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