Thats not what you said last night...
An all-purpose camp innnendo, silmilar to "...as the actress said to the bishop..." and only slightly slightly funnier:
eg: Person A: "It won't fit!"
Person B: "That's not what you said last night!"
Person A: "I'm not sure I like it"
Person B: "Ooooh, That's not what you said last night, Ducky!"
Person A: "I have decided to eschew homosexuality as I do not enjoy same gender sexual relations, despite any previous comments I may have made yesterday evening"
Person B: "Oh. Ummmm."
written by Th* Bo* Tuck*r, approved by Mansh