hit your straps

hit your straps

begin to perform as well as you can; hit your stride.
The expression, which is used mainly in sporting contexts, originated in Australian English. It may have originated in the idea of looking for the straps of one's swag pack, interpreted metaphorically as seeking a new job.
1992 Daily Telegraph A number of our players have not hit their straps for whatever reason, but they know that if they don't do it shortly, they'll no longer be part of the team.
See also: hit, strap