smart alecks

This is not our English word climbing although it only emphasizes my claim that these guys were smart-alecks making a pun like that.

这不是我们英语中的climbing，尽管这只能更加证明我的观点，这些自作聪明的人总是做那样的双关语。

And hackers are invariably smart-alecks.

而黑客无一例外都是爱耍聪明的家伙。