Caret
Using the caret symbol next to a word or on its own denotes irony. It's the equivalent of raising ones brow.
Example:
Patrick: Jesus is the one true Lord, get your head outta your ass.
Michael: ^ (caret, or "raise to" symbol)
Patrick: Jesus is the one true Lord, get your head outta your ass.
Michael: ^ (caret, or "raise to" symbol)