phrase → moment You use of the moment to describe someone or something that is or was especially popular at a particular time, especially when you want to suggest that their popularity is unlikely to last long or did not last long.
⇒ He's the man of the moment, isn't he?
⇒ He calls it a 'contraption', using his favourite word of the moment.
COBUILD Advanced English Dictionary. Copyright © HarperCollins Publishers