なんだこれは

Meanings

what on earth is this?

colloquialusually written using kana alone

Colloquial exclamation expressing surprise, confusion, or disbelief at something unexpected. Often used when encountering something strange or incomprehensible.

See also: なんだこりゃ

冷れい蔵ぞう庫こを開あけたら、何なんだこれは？変へんなものが入はいっていた。
When I opened the fridge, what on earth is this? There was something weird inside.
彼かれの描えがいた絵えを見みて、思おもわず「何なんだこれは」と言いってしまった。
Seeing the picture he drew, I couldn't help but say, "What on earth is this?"