not to put too fine a point on it

beside the point

Irrelevant, moot.

boiling point

The state of being heated, with high aggression.

brownie point

Credit or praise for good work or a good deed, often for the express purpose of currying favor.

chance'd be a fine thing

Synonym of no chance or fat chance, with a somewhat more cheerful attitude.

down to a fine art

To a point of exceptional proficiency.

fine feathers make fine birds

Something that appears beautiful or good is by definition beautiful or good.

fine line

A difference, albeit vague and difficult to discern.

fine print

The details, restrictions, terms, or conditions, especially of a contract, often printed in very small type.