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.