I think you'll find that the correct
expression is
"Nudge, nudge, wink, wink."Use of this expression is sometimes accompanied with a "tapping the side of the nose with the index finger" type gesture.
The Monty Python member who is most closely associated with this expression is Eric Idle. His legacy, the overly-familiar, slightly obnoxious character whose conversation is full of euphemism is quite evident in the provocative speech of the menswear shop assistants in the BBC's The Fast Show.
"Know what I mean? Say no more!"