If a place have too much women, then this place has more plot, full of traps, rather abruptly in the back stab someone in your knife.

一个地方如果女士过多，那么这个地方阴谋也更多，到处是陷阱，冷不丁的就有人在你后面捅一刀。

youdao

You criticize my appearance, and then you stab me in the back!

你批评我的外表，然后在背后捅我一刀！

youdao

Such a vicious lie could be nothing but a stab in the back.

这样一种恶毒的谎言简直是暗箭伤人。

《新英汉大辞典》

This would surely be a stab in the back.

VOA: special.2010.01.24

First of all, I found secretary Rumsfeld a very easy person to deal with in a sense that he's very professional, very strict, very honest, not the kind of guy who, you know, take a different position, try to around behind your back. If he's going to stab you, he's going to stab you in the chest.

首先，我发现拉姆斯菲尔德秘书长,是很容易打交道的人,我指的是他非常专业，非常严格，非常诚恳，不像那类人，因为观点立场不同,就从你背后放冷箭,如果他想杀了你，也是从正面进攻。

普林斯顿公开课 - 国际座谈会课程节选

John Lee Barrett, 31, died from a stab wound to his back at Sinclair's Bar on Drake Street.

BBC: John Lee Barrett

Home Office pathologist Dr Hugh White, told the jury that Mr Millar died as a result of a stab wound through the back of the chest into the left lung which caused severe internal bleeding.

BBC: Roger Millar

Mr Hepburn died from multiple stab wounds, mainly to his back.

BBC: Friend 'tried to help' bagpiper in Marsden stabbing