A colloquial prefix attached before verbs to indicate that an action is done forcefully, violently, or with strong emotion. Common in spoken Japanese (e.g., ぶっ壊す, ぶっ飛ばす).
彼は怒ってその箱をぶっ壊してしまった。
He got angry and smashed the box.
そんなに無茶をしたら、ぶっ倒れるよ。
If you push yourself that hard, you'll drop dead/collapse.
試合で相手をぶっ飛ばすつもりはないけど、本気でいくよ。
I don't mean to knock my opponent out, but I'll go all out.