Terry Bradshaw -- Rips Football Drug Smuggler ... 'That's Why Ya Practice!!'

Practice makes perfect ... even in drug smuggling ... so says Terry Bradshaw who just blasted the moron in Michigan who got busted trying to throw a drug-stuffed football into a prison yard!!!

In case you haven't heard ... authorities say some idiot tried to launch the drug-ball (which also contained cell phones and other contraband) over a fence and into a yard for an inmate on the inside to pick up.

But the pass fell short ... got stuck between two gates ... and the sorry excuse for a QB got busted.

So, when we spoke with Bradshaw about the pass-gone-wrong -- the NFL legend had some great tongue-in-cheek advice for the dude!!!