The tuck box says it all. The GFY acronym is short for Go F**k Yourself!! The coy asterisks aren't ours, they're on the box.
If you've got deleted expletives in the name, you have a pretty good idea what the games going to be like. Think Exploding Kittens NSFW rather than Cards Against Humanity. The risqué cards are mostly scatological rather than sexual, and there is anyway only a handful of cards in the deck that might actually cause offence. Indeed, if it weren't for the name of the game, you could happily pull those few cards and play this as an innocuous family game.
Published by Philadelphia Robot Factory, GFY comprises a deck of cards, each of which has an instruction. Each turn a player draws a card, plays a card and follows the instruction on that card. Typically, this will be to discard more cards, draw more cards, or give or take cards from another player.
The object is to be the first to dispose of all your cards. So GFY is quite simple although, to be fair, there is more of game here than you'll find in either version of Exploding Kittens. There's scope for strategy in setting up combinations that will enable you to deplete your hand but, beware, there are cards too that allow players to swap hands - so you could be setting up a winning combo only to find you are doing so only for someone else to reap the benefit. Likewise, you might find a player deliberately holding on to poor cards (those that force you to draw more cards) in the hope of being able to dump them onto an opponent.
You may find it annoying that several of the cards result in players missing a turn, but this is a fast-playing game so, even with six players, it's not as if you're going to be waiting more than half a minute for your turn to come around again. More of a criticism is the fact that the design of the cards makes it impossible to read the text/instructions when the cards are fanned in your hand. You will discover that the cards' different coloured edges identify those cards with similar text but, even knowing this, doesn't solve the difficulty that you can't really hold your hand of cards the way you'll have naturally come to expect.
GFY isn't going to change the gaming world but it can make for a diverting filler, with a hand usually taking no more than 5 minutes. The game is probably best with 4–6 players, but you can play it with fewer. Be warned though, playing with just two means that cards that instruct you to 'Skip next 2 players' will mean that both you and your opponent will miss your next turn (ie: the card will have no effect).