Offs, Receiver. Wtf? WTF? is a particularly eloquent means of articulating speechlessness at the stupidity, randomness or simple incomprehensibility of a communication, situation or proposition.

Responses can range from the apologetic Sorry, the reassuring Keep calm & carry on or Trust me, to a potentially flustered Oops and mock-accidental It's not what it looks like. Potentially problematic situations can be signalled with Awkward, but a manic Evil laugh offers perhaps the most effective retort.