Trailer phrase

• Slogan putting liberal in a stew
• Something funny in setting of gelatin
• Entertainer's signature
• Genitals mostly involved as point of joke
• Catchphrase
• Identifying phrase
• "One man's struggle to take it easy," for "Ferris Bueller"
• "Good night, and good luck," e.g.

Wiktionary Word definitions in Wiktionary
n. 1 The punch line of a joke. 2 (context computing English) A pithy quote habitually appended to a signature, used as an advertising slogan, etc. 3 A line attached to a draft of cargo or a container to provide control and minimize pendulation of cargo ...