Common used punctuation mark denoting a variety of possible meanings, ranging from an exclamation of delight, and statement of profound confusion, or a question posed in a frustrated or angry manner. Can even be used as an ending to all ordinary statements of no particular consequence. And all this with a post-modern!?! lack of regard for the correct use of punctuation.
"It's the weekend!?!"
"I know I drank too much when I've ended up in Australian again!?!"
"What the Hell is going on!?!"
"I'm eating toast!?!"