what the fuck
1. rude slang An exclamation of surprise and/or annoyance. When the car in front of me suddenly slammed on its brakes, I couldn't help but scream, "What the fuck?" A: "Oh, your phone bill came today. I think there's some overage charges on it." B: "What the fuck?"
2. rude slang Why not? An aside used to emphasize one's nonchalance toward something. Sure, I'm not doing anything today, let's go to the beach—what the fuck?