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1.
slang term for 'really?', 'for real?' or 'seriously?'

But can have a wider use colloquially as a one word reply to a statement which may not require an answer.
Thus this word is less inquisitive than its synonyms.
"I won the lottery today"
"unchallenged?"
"yeah"
-
"I almost had a car crash"
"unchallenged?"
*nods*"unchallenged."
-
"Im droping out of school"
"unchallenged"
by unchallenged December 22, 2004