penny pincher

a pound to a penny

Very likely; almost certainly.

bad penny

A person or thing which is unpleasant, disreputable, or otherwise unwanted, especially one which repeatedly appears at inopportune times.

penny for your thoughts

Used to inquire into the thoughts and feelings of another, especially when the person appears pensive or conflicted.

penny in the fusebox

An improvised repair made with no regard for safety.

penny wedding

A wedding at which the guests contribute payments in order to fund the event and to benefit the newly-married couple.

penny wise and pound foolish

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

pretty penny

Chiefly preceded by a: a considerable amount of money; a high income or price.

ten a penny

So common as to be practically or almost worthless.