radar checkpoint

synonym for the new guard-rail radars being used by police officers, due to the belief that they can, will and are being used to also track where you and you car is at certain intervals, and where you go, in an effort to thwart certain people's alibis, for example.

"Sir, I was at home last night around 11 pm."
"Actually, one of our radar checkpoints indicate that you were, in fact, headed towards the marshes around that time, which is where we found your ex girlfriend."
"Well, big brother has fucked me right up the ass, there, didn't he?"
"He sure did, son. Now time for prison rape for the rest of your life."