なんのこと

何のこと

表記・読み：何の事・なんの事・なんのこと

1. 1

   what; what sort of thing

   expressions (phrases, clauses, etc.)名詞
2. 2

   something out of the ordinary; something unusual

   expressions (phrases, clauses, etc.)名詞
3. 3

   what the heck; holy cow!

   感動詞