Definition
To physically attack someone who is already vulnerable or defeated.
(在对方已经倒地后)继续踢打。
When he fell in the mud, the bullies started to put the boot in.
当他跌倒在泥泞中时，那些欺凌者开始对他拳打脚踢。
During the match, one of the players fell down, and the opposing team started to put the boot in.
比赛中，一名球员跌倒了，对方球队开始对他进行踢打。
He was already injured, and then they put the boot in, it was just too much.
他已经受伤了，然后他们还对他拳打脚踢，实在太过分了。
To worsen an already difficult situation by being critical or unkind.
雪上加霜
After he was fired, his boss put the boot in by publicly criticizing his performance.
他被解雇后，他的老板还公开批评他的表现，简直是落井下石。
She was already depressed, and her friend put the boot in by continuing to make sarcastic remarks.
她已经很沮丧了，她的朋友还继续冷嘲热讽，真是雪上加霜。
When she was trying to overcome a difficult period, her family put the boot in by laying blame on her, which made things worse.
当她试图度过困难时期时，她的家人却把责任推到她身上，让情况变得更糟。