I respect the concept of the ‘cheat day’ and if it works for you then keep ‘cheating’.
Call it whatever you want; I don’t want to argue over definitions.
However, my preference is not to think of it as ‘cheating’.
Who are you cheating on?
What game are you cheating at?
Is it really cheating, if your body has to process everything that you put into it, without exception?
You’re allowed to enjoy yourself once in awhile.
That’s called freedom.