In one episode of the Cartoon Network animated series Adventure Time, Jake the Dog and Finn the Human play a card game similar to Yu-Gi-Oh. Jake is an experienced player, while Finn has no idea what the rules are. (The rules, just as in Yu-Gi-Oh, are incredibly convoluted and difficult to understand.)
In the game, “flooping” a card means you turn the card over before using it to attack. One of Finn’s cards is a pig, and during the game he floops the pig – completely destroying Jake’s army of grain-based Husker Knights in the process. I laughed my butt off at that.
You can see part of the episode here: - YouTube.
My wife and kids got me a t-shirt featuring a sword-wielding Finn riding a pig, with the caption “I floop the pig” on it. I always get strange looks when I wear that shirt.