From Teflpedia

Cheating (/ʧi:tɪŋg/) is acting dishonestly or unfairly in order to gain an advantage.

Students sometimes cheat. In a fun game, it doesn't matter. In an exam, it does.

Plaigarism in academic contexts is often cheating. A related issue is the "bespoke essay writing services" whereby the student can buy essays instead of doing the work themselves.

Accusations of cheating can have widespread consequences. The UK Home Office, which has a track record of being a hotbed of institutionalised racism, is currently embroiled in a scandal in which on the basis of flimsy evidence, it has accused several thousand overseas students of cheating in English tests. [1]