When you’re playing a game and you are operating outside of the official rules of a game, or when the rules are being made up as you go along. This is known as Filey rules.
Player A: The taxes go to free parking and whoever lands on it can collect the cash !
Player B: That’s not the real rules of Monopoly Player A: Yeah but we’re playing Filey rules
ficey is an combination of the 2 words "fruity" (as in gay) + "spicey" (as in hot), this combination was created in a groupchat (I AM NOT IN IT SO IT IS NOT AN INSIDE JOKE) who also has a tiktok account and spreaded this word and now people use it that arent in the groupchat (me).