Wiktionary
n. (context US slang English) A cinch; something very easy.
Usage examples of "lead-pipe cinch".
If she kept her wits about her, she said to herself, this was a lead-pipe cinch.
The show has been an airtight lead-pipe cinch from the very outset.
She gave me the same kind of look that I give Billy Fourth Street every time he tells me he's got an absolute lead-pipe cinch in the sixth at River Downs, but she didn't say anything, and a moment later she left.
But when you control the distribution lifelines, you control the industry, and when you have the power to fire any distributor who puts a single copy of a rival's publication on display before all of your own are sold, you are a lead-pipe cinch to wind up with the lion's share of the market.
It was a lead-pipe cinch that, because I'd made a date, Tinnie would suffer a miraculous remission from the sulks.
They were obviously pocketless pajamas-- and if he was carrying a gun in one hand and a flashlight in the other, it had been a lead-pipe cinch he wasn't carrying a house-key between his toes --he wouldn't have locked himself out.
Knowing Mac, though, it was a lead-pipe cinch he'd catch on sooner or later.