诡雷是军事上一种主要对象为步兵的设备，更通俗一点的说法就是军用陷阱。它可以发出信号指出敌军位置或直接杀伤敌军。诡雷跟地雷名字上差不多，但需注意的是诡雷不一定要从中加上炸药，亦不一定要装在地下。诡雷往往会加上一些诱饵（战利品）以吸引受害人触发。然而，在某些情况下日常行为如开门、捡起物品或开灯亦会触发。这些可以致命的诡雷与英文中的Booby trap有少许不同，中文专指军事上用的设备；英文却同时能指恶作剧的设备。诡雷通常用于游击战或撤退中，因为当该地点还互有攻防时诡雷的作用并不大。

A booby trap is a device or setup that is intended to kill, harm or surprise a person, unknowingly triggered by the presence or actions of the victim. As the word trap implies, they sometimes have some form of bait designed to lure the victim towards it. At other times, the trap is set to act upon trespassers that violate personal or restricted areas. The device can be triggered when the victim performs some type of everyday action e.g. opening a door, picking something up or switching something on. They can also be triggered by vehicles driving along a road as in the case of improvised explosive devices (IED's).