The core Okey terms are indicator, okey, false okey, run, set, and pairs finish.

The indicator is the face-up tile that sets the joker; the okey is that joker, one number above the indicator in the same colour. A false okey is a blank tile standing in for the indicated tile. A run is same-colour consecutive numbers; a set is the same number in different colours. A pairs finish means going out on seven pairs for double. Learning this vocabulary makes it much easier to follow guides and play with confidence.