(slang) a doubly sure or doubly easy thing.
Lead pipe refers to a midwestern and western US
form of galvanized
iron pipe (which looks as if it were
lead). For saddling and cinching (fixing a saddle securely) the sort of horse that expands its belly, a
short length of this so-called
lead pipe was slipped under the saddle strap and turned like a tourniquet, the
work assisted by a few knee jabs in the belly. Thus the horse was forced to deflate and the saddle was cinched tight, that horse now being double (
lead-
pipe) cinched. Now, I see some auditors are going to be going
home to their groups and friends and so on; they'll be playing this
gag on them, I know this. This is a
lead-
pipe cinch.
-Man's Search and Scientology's Answer (4 July 1957) (slang) a doubly sure or doubly easy thing.
Lead pipe re fers to a midwestern and western US
form of
iron pipe (which looks as if it were
lead). For saddling and cinching (fixing a saddle securely) the sort of horse that expands its belly, a
short length of this so-called
lead pipe was slipped under the saddle strap and turned like a tourniquet, the
work assisted by a few knee jabs in the belly. Thus the horse was forced to deflate and the saddle was einched tight, that horse now being double (
lead-
pipe) cinched. Now
3N, that's a
lead-
pipe cinch.
-R2H Fun damentals (7 Aug. 63)