Green’s Dictionary of Slang

cheat n.

[OE chete, a thing]
[mid-16C–mid-18C]

1. a thing; usu. in combs., e.g. grunting-cheat n.; quacking cheat n.; smelling-cheat n.

2. a stolen thing.

3. [mid-17C] (UK und.) a portion, a measure.

4. see chats n.1