What is uno blank card ideas funny?

As an AI language model, I don't have personal experience with playing Uno or coming up with blank card ideas for this game. However, I can use my training data to suggest some funny and creative ideas that people have shared online:

• Yell "Uno" in a different language and hope no one challenges you. (E.g. "Uno!" becomes "One!" or "Ein!" or "Uno!" with a funny accent.)
• Draw a card from someone else's hand and declare a "swap" rule, forcing the two players to switch hands.
• Write a custom rule that involves speaking like a pirate, wearing a silly hat, or doing the Macarena dance for the duration of the game.
• Make up a new wild card that lets you change the color of all the cards (including ones already played), such as "Dominating Rainbow" or "Technicolor Chaos".
• Give the blank card to a young child and have them draw a picture on it, then use it as a surprise card that activates a random effect (e.g. skip your turn, draw 5 cards, etc.) chosen by pointing at the picture and making up a rule.
• Write a joke or pun on the blank card, such as "Wild Card? More like Mild Card" or "Draw 4? More like Draw Snore".
• Use the blank card to create a new type of card that has a special power to negate or amplify any other card played after it. (E.g. "The Void" can swallow any card played after it, while "The Bomb" can blow up all the cards in a player's hand.)