Expression: N'importe quoi
Pronunciation: [neh(n) puhr t(eu) kwa]
Meaning: anything / nonsense, whatever
Literal translation: no matter what
Register: normal / informal
Notes: The French expression n'importe quoi has a few different uses. Normally it means "anything," as in je ferais n'importe quoi pour gagner - "I'd do anything to win."
Informally, N'importe quoi ! or C'est du n'importe quoi ! means "Nonsense!" (US) or "Rubbish!" (UK) Another possible translation is "What the heck are you talking about?!"
Though not a perfect equivalent, n'importe quoi is also the best translation I've found for "whatever!", the (primarily) adolescent expression of dismissal.
Examples:
Ce magasin vend tout et n'importe quoi.
This store sells anything and everything.
N'écoute pas Philippe - il dit n'importe quoi.
Don't listen to Philippe - he's talking nonsense.
Related: C'est en faisant n'importe quoi, qu'on devient n'importe qui ! (or ...que l'on devient...)
This expression, "It's by doing nonsensical things that you become nonsensical," is the motto of the French prankster and video maker Rémi Gaillard, aka N'importe qui. It's a play on the French proverb C'est en forgeant qu'on devient forgeron (Practice makes perfect, literally "It's by forging that one becomes a blacksmith.")
Lessons: Expressions with n'importe | On vs l'on
Post your comments about the French expression n'importe quoi on my French blog - just hit "comments" at the bottom of the post.

