Your associating the word "cheat" with being dishonest.
It is a word that I use to remind my son of a few items while preparing to receive.
It was also taught to him by a former MLB catcher. It simply refers to shifting his body and feet AS he is receiving the ball instead of AFTER which is both legal and taught. Saying "cheat it" is easier than saying " don't forget to initiate your footwork as your receiving the ball. Don't wait". I'll also say cheat up if I thinks he's too far back or suspects a bunt ( when a batter is way up in the box).
Your associating the word cheat like he's breaking rules.