The sexual practice in which you convince your girlfriend/wife/partner/whore to gargle on your baby gravy, then unexpectedly you uppercut her in the sternum screaming "SURPRISE" and avoiding the consequent rainbow of liquids.
Where's Katie?

In hospital with a punctured lung. Tyrone went a bit far when he Gargle Gargle Surprised her.
by UrbanBob June 7, 2010
Get the Gargle Gargle Surprise mug.