See:
twatPronounced "Twhaaaaaat??"
Generally a word subtly replaced with "what" when someone you don't like says something to you from a
distance or you can't understand what they said.
You can call them a twat without them knowing and silently
giggle to yourself.
An angry boss:
"Hey John!
GET BUSY OR PRETEND LIKE YOU ARE!"
John replies like he didn't hear him
"
TWhat?"
"Twhaaaaaat?"
Similar to
"
I cunt hear you"