lam into (someone or something)
To attack someone or something with sweeping or thrashing blows. The principal is facing criminal charges after lamming into a student who had been caught defacing school property. He lammed into the horses pulling the carriage with his whip.
lam into (someone or an animal)
Fig. to attack someone or an animal. Paul was so angry that he lammed into his friend and struck him in the side. The angry coachman lammed into the poor horses.