godan verb (-ru), transitive verb
Emphatic, colloquial verb for striking someone forcefully with a fist. Often used in rough or angry contexts.
あいつをぶん殴ってやりたい。
I want to punch that guy hard.
いきなり顔をぶん殴られた。
I was suddenly punched hard in the face.
Standard kanji-kana mixed spelling.
Search-only katakana-kanji mixed form.
Rarely used kanji form; 打 is an uncommon choice for this prefix.
The prefix ぶん- is an emphatic, colloquial intensifier attached to 殴る (to punch). The exact origin of ぶん is uncertain, but it may be related to onomatopoeic or mimetic elements expressing force.