"Nudge Nudge" is a sketch from the third Monty Python's Flying Circus episode, "How to Recognise Different Types of Trees From Quite a Long Way Away." It also appears in And Now for Something Completely Different and the 1981 concert film Monty Python Live at the Hollywood Bowl.
A younger man, Arthur Nudge, (Idle) asks an older gentleman (Jones) several questions about his relationship with his wife, all bearing questionable sexual innuendo. The gentleman replies in a confused, non-committal sort of way, and the younger man repeatedly responds with an enthusiastic "Nudge, Nudge, Wink, Wink, Say no more!" After a time the older man becomes annoyed by Arthur's inquiries and demands to know what he is getting at. Arthur admits that he is asking about sex and then asks "...what's it like?"
Behind the scenes
The sketch was originally written by Eric Idle for another comedy show and it was rejected as a script. Eric Idle openly admits the script is confusing, the joke being mostly in the delivery.