I'm hoping there is a separate circle in Hell for inventors of government euphemisms. Certainly, their terms deserve their own category here.
Checkpoint. Cop-speak for roadblock. I just use the word roadblock.
Officer safety. Cop-speak to nullify the line in Terry v Ohio about nothing in the initial moments of an encounter serving to dispel the officer's concern for his safety and others nearby. Just invoke the holy words officer safety, and nobody bothers to wonder whether the cop used any judgement as required by Terry.
Resisting arrest. Cop-speak (as proved by a number of videos) for being completely still while being handcuffed and held by several cops. Can include trying to defend yourself from a gratuitous police assault prior to cuffing.
Furtive movement. Cop-speak for reaching for your license in the console, glove box, or visor during a traffic stop, but before the cop arrives at your car door. Excludes a jurisdiction where an appellate court expressly ruled that reaching for your license is not a furtive movement, highlighting that some cops actually have to be told this by an authority figure. The problem with the term is that the word furtive is not a fact; it is an evaluation of a fact. A movement is just a movement. In order to determine whether it was furtive, more facts are needed to know whether the adjective is appropriate. What was it (facts) that made it furtive? When a cop testifies to a furtive movement, he's hoping listeners will not notice the evaluative nature of the word furtive and omit to ask for the rest of the facts that made it furtive.
Dynamic entry. Cop-speak to cover up/gloss over the violence of battering down a door, possibly while tossing flash-bang(s) into the residence.
Pyro-technic device: Cop-speak for an explosive device called a flash-bang. If you've ever seen one detonated, you have no doubt it is an explosive. Pyro-technic device includes tear-gas grenades, so its actually a legitimate term perverted whenever applied to flash-bangs.
C(onductive) E(lectrical) D(evice): Cop-speak for electro-torture pain-compliance devices. Also known as tasers.
Less-lethal: Cop-speak for sometimes lethal. Usually in reference to tasers. The term was converted from the original non-lethal after so many people died from these things as to force the change. There are a few interesting things to note. A taser is regarded as a deadly weapon when seized by a criminal and used against a cop. Also, people are known to suffer brain injuries, and broken bones and teeth, from falling rigidly against sidewalks and curbs. Compare to part of the justification for lethal force in self-defense: threat of grave bodily injury or death. Police training videos are very revealing--when police or cadets receive a demonstration tasering, they are often wearing helmets and fall onto gym mats.
Reasonable articulable suspicion (RAS): Cop-speak/court-speak to cover up temporarily seizing an equal when the cop doesn't even know whether that equal is as little as probably guilty. Government openly acknowledges that numerous innocent equals are seized. The fallacy includes the underlying lie that the equal consented to be governed thus. Also, the term reasonable gives it a nice flavor.
Readers, please chip in.