Grammar › N3 · 13 Particles and endings, more
だって: even; but; because
N3 · 13 Particles and endings, more
Colloquial: "even", or "but/because" when making an excuse.
N だって = even N, N too. Sentence-initial だって = but, well. Also quotes: 〜だって = I hear. Casual only.
Examples
大人だって間違えますよ。
Even adults make mistakes.
だって、知らなかったんです。
But I didn't know!