What is the meaning of Butty?

A sandwich, usually with a hot or cold savoury filling buttered in a barmcake. The most common are chips, bacon, sausage and egg.

A friend.

A miner who works under contract, receiving a fixed amount per ton of coal or ore.

A workmate.

A drudge; a cat's paw; someone who does the hard work; someone who is being taken advantage of by someone else.

One of a pair of shoes or gloves.

To work together; to keep company with.

To cohabit; to reside with another as a couple.

To act in concert with intent to defraud; to play unfairly.

Resembling a heavy cart.

Source: wiktionary.org