What does shave and hair cut 2 bits mean?

"Shave and a haircut, two bits" is a phrase that refers to a traditional cost for a basic grooming service, specifically a shave and a haircut, in the early 20th century. The term "two bits" is slang for 25 cents, reflecting the price for these services at that time. The phrase is also commonly associated with a catchy musical jingle, often used in popular culture, which typically consists of a two-note melody followed by a distinctive two-note finish.