rubber baby buggy bumper

== English == === Etymology === From a well-known tongue twister. === Noun === rubber baby buggy bumper (plural rubber baby buggy bumpers) (slang) A contraceptive diaphragm. Synonym: catcher's mitt Coordinate term: rubber Used other than figuratively or idiomatically: see rubber,‎ baby buggy,‎ bumper,‎ (a rubber bumper for a baby buggy).