stick a fork in something

a little of something goes a long way

Only a small amount of something is usually required to produce a great effect.

beat off with a stick

To reject (a person making an unwanted amorous approach).

beat with the ugly stick

Used to describe someone who is particularly ugly or unattractive.

carrot and stick

The simultaneous rewarding of good behavior and punishing of bad behavior.

chalk something up to experience

To take a lesson from a bad outcome instead of grieving it.

clue stick

A metaphorical stick used to beat information or understanding into a slow learner.

Dukes

[Cockney slang]fork, i.e. hand, now chiefly when balled into a fist

via Duke of York

fork off

to diverge into two or more separate paths.