Sister to sloppy brother : "I love the mustard stains on your hoodie. They really bring out the color in your eyes!"
Sarcasm. People don't compliment messes so instead she is poking fun at the stains.
Say phrase in a sarcastic and sincere way: "Well, what a surprise!"
Sarcasm ex. Greg forgot the chips for the party. He is known for being forgetful. Sincere ex. Emilio surprised his mom by coming home for the holidays.