nudge nudge wink wink
Definition from Wiktionary, the free dictionary
- (idiomatic) A phrase added at the end of the sentence to hint that the speaker is referring to something else, euphemistically.
Usage notes 
- This is the equivalent of nudging someone and winking at them, which cannot be done in writing. When spoken, adds a humorous connotation.
- In some areas is said as "wink wink, nudge nudge"