vulgar slang To engage in sexual intercourse. "Bologna," referring to a type of sausage, is a vulgar slang term for a penis. "Hide the bologna" is sometimes hyphenated. A: "So, did you two play hide the bologna last night?" B: "Hey, that's a very personal question!" They made out on the dance floor for a while before going back to her dorm room to play a little hide-the-bologna.