Top definition
Extremely excited;overly joyed. To have never ending happiness.
"That cheerleader over there is flabbergastic!"
"I know, she's the girl who never stops clapping!"
by Maggie SE May 12, 2007
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2
to have an unusual urge to rape a cow. also can be said as a moo-diction.
"thats bullshit" "that makes me flabbergastic"
by punchyboy23 November 10, 2008
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