particle, adverb
things like; something like; someone like; such a thing as; that; to think that
Expresses disdain, dislike, astonishment, or emotional emphasis. Often used to belittle or express surprise about something. Can nominalize a preceding clause and add a dismissive or emphatic tone. Common patterns: 〜なんて (after nouns), 〜だなんて (after clauses), 〜するなんて (after verbs).
彼がそんなことを言うなんて信じられない。
I can't believe he would say such a thing.
あの人なんて、全然知らないよ。
Someone like him? I don't know him at all.
こんなに高いなんて、買えないよ。
It's so expensive — I can't buy it.
Derived from 何 (nani, 'what') + とて (tote, an old quotative/conjunctive particle). The exact historical development is uncertain, but it functions as a colloquial particle expressing emotional emphasis.