bad guy

基本解释

The goal of such scans is to detect any weaknesses and use the results to address the problems before the "bad guys" do.
这种扫描的目的是探测弱点并在某些 “坏家伙” 发动攻击前用扫描结果解决问题。
‘Power’ is held by the bad guys at the top, and is not conceived as something that permeates the entire social body, determining how we work, think and consume.
“权力”为那些上层的坏家伙所掌握，并且，不被设想为某种贯穿整个社会集体，决定我们如何工作、思考和消费的东西。
Why they’re not always the bad guys.
他们并不总是坏小子，为什么？

"The bad guys keep coming." "And no matter whether the apprehension rates rise or fall, the numbers of criminal aliens rise.
And this is useful because if you're actually writing a program that's interactive or that you want to change overtime much like you would a game, hopefully, the game is not going to have the bad guys, for instance, always standing in the same place or the rocks or whatever it is falling from the sky in the same place 'cause it would very quickly become a very tedious game.
这是很有用的，因为如果,写一个交互的程序或者,希望每次游戏都不一样，我们希望，游戏中的坏人物，别老是站在同一个地方或者同一块石头上,或者从天空中同样的位置落下,因为这立刻会使游戏变得乏味。
哈佛公开课 - 计算机科学课程节选
"It is,in the end,about the people. And in a counterinsurgency the people of Afghanistan are going to throw the bad guys out.

Any time something goes wrong there is an immediate search for the bad guys who created the problem.
FORBES: Briefing Book: A. Michael Lipper

A bad guy is a person in a story or film who is considered to be evil or wicked, or who is fighting on the wrong side. You can also refer to the bad guys in a situation in real life.