perfectly; spot on — indicating that something is done perfectly or is exactly right (colloquial).
試験の準備はバッチリだから安心して受けてきて。
My exam prep is perfect, so go take it with confidence.
写真、バッチリ写ってるね！
The photo came out great!
彼の説明はバッチリで、誰も疑問を持たなかった。
His explanation was spot on and no one had questions.
thoroughly; completely; sufficiently — used to say that something is enough or fully done.
寝不足でも、ちゃんと寝ればバッチリ元気になるよ。
Even if you're sleep-deprived, if you sleep properly you'll be fully refreshed.
本番前にリハーサルをして、準備はバッチリだ。
We did a rehearsal before the performance — preparations are complete.
薬を飲めばバッチリ治るでしょう。
If you take the medicine, you'll be completely cured.