godan verb (-su), transitive verb
beat up; knock down; beat to a pulp
Colloquial and forceful. Implies a one-sided physical beating, often leaving the opponent unable to continue.
あいつをぶちのめしてやる。
I'm gonna beat the crap out of him.
彼は喧嘩で相手をぶちのめした。
He beat his opponent to a pulp in the fight.
godan verb (-su), transitive verb
devastate; crush; overwhelm; defeat resoundingly
Figurative extension: to deal a crushing blow emotionally, mentally, or in competition. Often used when someone is left reeling or unable to recover.
その知らせは彼をぶちのめした。
The news devastated him.
我がチームは相手をぶちのめして優勝した。
Our team crushed the opponent and won the championship.