An Italian-American restaurant known for serving traditional pasta dishes with tomato-based sauce. They new Italian restaurant that opened up downtown is a throwback to those authentic red-sauce parlors that my parents used to take me to as a kid. I grew up working in my grandfather's red-sauce parlor, so I know just about everything there is to know about pasta.

dated slang A bar or tavern. "Sauce" is a slang term for alcohol. I heard Tommy's dad spends more time at the sauce parlor than he does at home. The cops spotted the two criminals coming out of the sauce parlor and took them in for questioning.