Merry-go-round

a pound to a penny

Very likely; almost certainly.

an ounce of prevention is better than a pound of cure

Precaution and prevention of an undesirable thing is preferable to dealing with its potential consequences.

penny wise and pound foolish

Prudent and thrifty with small amounts of money, but wasteful with large amounts.

pound a beat

Of a police officer, to walk a regular route.

pound of flesh

Something which is owed and which will be hurtful or difficult to provide; a debt owed to someone who is merciless and demanding.

pound sand

To engage in a simple, useless activity that anyone would reasonably know how to perform.

pound the pavement

To travel on foot; to walk or run.