also: かちこみ · カチコミ
noun
raid; busting in
Slang term for a raid or forceful entry, similar to 殴り込み. Often used in contexts like gang confrontations or police raids.
See also: 殴り込み
敵のアジトにカチ込みをかける。
We're going to raid the enemy hideout.
警察がヤクザの
The police raided the yakuza office.
殴り込み is a more standard term for a raid or bust-in, while カチ込み is slangier and often implies a more aggressive or violent entry.
Likely derived from the verb カチ込む (to barge in), itself a slang compound of カチ (possibly from 勝ち or onomatopoeic) and 込む (to go into). The exact origin is uncertain.