If you say
that someone or something is a nine -day wonder
one -day wonder
, you disapprove
of the fact that they are attracting
so much interest and attention
, because you think
that their popularity will only last for a very short time.
Harry dismissed his old friend's speech as 'a nine-day wonder'.
Some supernova researchers wondered if it might be just a nine-day wonder.
COBUILD Advanced English Dictionary. Copyright © HarperCollins Publishers