- (slang, humorous) Sexual intercourse.
- 2001, 8 February, Brie, Helloooooooo??????????, https://groups.google.com/forum/#!original/alt.tv.x-files/5tlRl7kQadE/AJOPJSFbckgJ, alt.tv.x-files, “I really really need snu snu”
- 2001, 30 August, Deviated2 [username], Re: Exodus from Genesis just on, https://groups.google.com/forum/#!original/alt.tv.farscape/CZOizRyGOpY/7hay-ZxuzzAJ, alt.tv.farscape, “Am I wrong or did Rygel get some snu snu in this episode too?”
- 2009, 12 March, Paul G., Re: Sudden failure of Aluminum Frame, https://groups.google.com/forum/#!original/rec.bicycles.racing/X1_xTwLjbVg/DKAvF1cm3K0J, rec.bicycles.racing, “The death-by-Ferrari scenario seems pretty common. What a way to go. Well, not as good as snu snu, but close.”