bluff one's way through life(The most common secret is a deep conviction of basic inadequacy—a feeling that one is basically incompetent, that one bluffs one’s way through life. (Irvin D. Yalom)adenisoff)
spray and pray(A term commonly used amongst FPS players, "Spray and Pray" refers to the practice of unloading your clip in the general direction of another player in the hopes that you'll hit them. Generally considered a good indicator that someone is a noob.: If you're new to Counter-Strike, just spray and pray. Actually aiming comes later.urbandictionary.comAlexander Demidov)
Hail Mary(A plan or project with little chance of success. Oxford Dictionary of English: Nobody thought this was a 60-win team, mind you, but certainly a strong enough group to return to the playoffs without a Hail Mary deal.
I can only imagine this was the perp's attempt at a Hail Mary to get key evidence thrown out.Alexander Demidov)