to have something in reserve but ready for use; to have a chance or opportunity remaining—nautical, USA, 1789—‘shot’: a projectile designed for discharge from a firearm—‘locker’: the compartment for keeping ammunition on a ship
to vomit, especially from drunkenness—slang, obsolete—1609 as ‘to jerk the cat’—perhaps alludes to the fact that cats are prone to vomit—cf. also the obsolete French verb ‘renarder’, to vomit, from the noun ‘renard’, denoting a fox
to upset, to overturn—1777—origin unknown—perhaps based on Spanish ‘capuzar’, meaning ‘to sink (a ship) by the head’—or perhaps based on a Provençal compound of ‘cap’, meaning ‘head’