expression, pronoun
Emphatic expression meaning 'anyone at all' or 'everyone without exception', used with affirmative verbs. Similar to 誰にでも but more colloquial and emphatic.
See also: 誰にでも (だれにでも)
誰にだって失敗はある。
Everyone makes mistakes.
誰にだってできる簡単な仕事だ。
It's a simple job that anyone can do.