pack
go to the pack deteriorate; go to pieces. Australian & New Zealand informal
1980Frank MoorhouseDays of Wine and Rage All the places overseas where the British have pulled out are going to the pack.
the joker in the pack: seejoker.
pack your bag (or bags) put your belongings in a bag or suitcase in preparation for your imminent departure.
pack heat carry a gun. North American informal
pack it in stop what you are doing. informal
pack a punch
1 be capable of hitting with skill or force.
2 have a powerful effect.