with a bang bang; repeated loud noise
Mimetic adverb for repeated loud, sharp sounds like hammering, gunfire, or explosions.
He banged on the door repeatedly.
Someone next door is banging on the wall repeatedly.
at a mad pace; vigorously; like crazy
Describes doing something energetically, rapidly, or without restraint. Often used with verbs like 食べる, 飲む, 進む, 使う.
He spends money like crazy.
Work is progressing at a mad pace and it feels great.
The kids chowed down on their food like crazy.
The soldiers fired their guns bang bang.
There are employees who spend company expenses freely without restraint.
This new product is selling like crazy.
バタバタ describes a fluttering or bustling noise/motion (like flapping cloth or running around busily), while バンバン is specifically loud, sharp banging sounds.
パンパン describes a sharp slap, clap, or bang, while バンバン (nearly the same sound with voiced consonants) suggests louder, repeated bangs like gunfire.
Katakana spelling is common for this onomatopoeic adverb.
Hiragana spelling is also used.
Onomatopoeic formation from the sound of repeated bangs. The vigorous sense is a figurative extension of the rapid, forceful sound imagery.