なんだこりゃ

expression

what on earth is this?; what the heck is this?

Colloquial, informal exclamation expressing surprise or bewilderment at something unexpected. Often used by men, but not exclusively. Similar to なんだこれは but more casual and emphatic.

See also: なんだこれは

• なんだこりゃ！こんなの見みたことない。

  What on earth is this?! I've never seen anything like it.

• 机つくえの上うえに変へんなものが置おいてあって、「なんだこりゃ」と思おもった。

  There was something weird on the desk, and I thought, 'What the heck is this?'