Definition of butties:
(n) :
(UK, chiefly Northern England, New Zealand, Ireland) A sandwich, usually with a hot or cold savoury filling buttered in a barmcake. The most common are chips, bacon, sausage and egg.
(n) :
(colloquial, UK, now chiefly Wales and West Country) A friend.
(n) :
(colloquial, UK) A workmate.
(n) :
(mining) A miner who works under contract, receiving a fixed amount per ton of coal or ore.
(adj) :
(dated, Ireland and West Country) Resembling a heavy cart.
(n) :
(archaic, UK dialect, among boys) A drudge; a cat's paw; someone who does the hard work; someone who is being taken advantage of by someone else.