what is rubber baby buggy bumpers from

"Rubber baby buggy bumpers" is primarily known as a tongue twister phrase. It literally refers to the rubber bumpers on a baby carriage (baby buggy). In slang, it can also mean a contraceptive diaphragm. The phrase gained recognition from the difficulty of pronouncing it quickly and has appeared in popular culture, including movies and songs. Additionally, it can be used in playful or humorous contexts to practice English pronunciation.