Jamessurance

(pronounced Jame-assurance) A personal guarantee that Jameson Irish Whiskey will be available, poured, and enjoyed during a particular time or event; typically used as encouragement to gain one's attendance at said time or event.

Brian: Are you coming out afterwards?

Lisa: Meh. Not sure.

Brian: I can provide strict Jamessurance it will be worth your time.

Lisa: Say no more.