Workers or machines that pack items into boxes or containers, or the Green Bay Packers professional football team.
From 'pack' (to put things together compactly) plus the '-er' suffix meaning one who does the action. Originally referred to workers in slaughterhouses and factories who packaged products.
The Green Bay Packers got their name because Green Bay had a packing plant that sponsored the team in 1919—so a factory nickname became one of the oldest and most famous NFL teams!
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