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pack up
Stop doing something
Finish work
Break down, stop working
Collect things and put them where you keep them
pack in
Stop doing something
End a relationship
Fill a venue
Break down, stop working
pack away
Put something where it belongs
pack out
Fill a venue
pack it in
Stop doing something (used as an imperative)
pack off
Send someone away
pack on
To add (fat, muscle, etc.) so as to increase mass or bulk.