Basically when someone is too shocked to talk or to process what's happening.
person 1: BRO, I just f*cked your mom.
person 2: ... (They are flabbergasted)
To be extremely surprised or shocked.
I'm absolutely flabbergasted Woross is mentally capable of wiping his own ass.
Is a word used to describe if you are speechless or at a loss of words to use.
For example: Im Flabbergasted...
When you just took a shit and you feel empty inside.
"Dude! That taco had me Flabbergasted!"
adjective
past tense of flabbergast
It is the feeling of great surprise and astonishment.
feeling shocked, usually because of something you were not expecting
When they announced her name, the winner just sat there, flabbergasted.