keep the ball rolling

ball hog

In team sports, a player who keeps the ball to themselves, rather than passing it.

ball of fire

A person who is especially active, ambitious, hard-working, or high-achieving.

ball of malt

A glass of whiskey.

carry the ball

To lead in terms of responsibility, initiative, or progress.

cobbler, keep to your last

One should not criticise matters outside one's field of expertise; one should mind one's business.

drop the ball

To fail in one's responsibilities or duties, or to make a mistake, especially at a critical point or when the result is very negative.

earn one's keep

To perform satisfactory physical labor or to provide other worthy services in return for remuneration, lodging, or other benefits; to support oneself financially.

get the ball rolling

To begin; to start some action; to set in motion.