the act of pushing someone into a sexually compromising position in the pretence that you are saving them from an invisible (but highly dangerous) sniper. Average numbers of sniperings rise near church towers or other vantage points popularly used by these marksmen.
tom: SNIPER!!! (dives on judy)
judy:wtf, get the hell off me
tom: sorry judy, there was a sniper in that churchtower.
july: oh well thats allright then