Is my user name vaguely correct?

[MyGastIsFlabbered]

Or should my flabber be gasted/ghasted?

I looked it up but can't find the explanation now and can't quite convince myself that it's right (as right as it can be anyway). Do I need to change it?

As a general rule my flabber is gasted.

My flabber is definitely gasted.

Your user name, however, is brilliant

I don't know but you've led me down an interesting google of the origins of the word. Suffolk, or maybe Scotland. Might come from flabby +aghast, might come from flappy (although someone else thinks flap came later than 1772, when flabbergast was first recorded). So no-one knows - which means whatever your name is is correct.

Or should your flabber be aghast? or are you aghast at your flabber?