Meanings
colloquialAn emphatic rejection of something one has just heard and does not believe or agree with; nonsense!, come on!, come now!
colloquialused as intensifier
Hunderte, ach was - Tausende Menschen strömten auf den Festplatz.Hundreds – no, make that thousands – of people flocked to the fairground.
colloquiala response to the obvious; oh really!, you don't say!