Snow Fence 

During sexual intercourse, when a female uses her hands as a barrier to prevent projectile semen from landing above a chosen area.

Oh shit girl! I'm 'bout to skeet skeet, so you best be buildin' that snow fence before you get my jackins all up on you!

Snow Fence by 1BUPP September 22, 2011

Urban Snow Fence

As noted by New York City Street Police: Taking place in winter, this beat cop coined phrase is metaphorical in meaning, yet actually functional of purpose if conditions right:

This stupid human trick requires a minimum of four unknowing participants and one sleepy-head street dealer of flake cocaine. The phenomena usually takes place on the third calender day of the month, which of course is welfare, disability and social security check arrival time. It is during a blowing snowstorm that four or more appropriately attired individuals wait for said drug dealer. They stand at a light post in an orderly first come first served line. This arrangement, in effect, duplicates the function of a rural snow collecting drift fence.

I didn't know it was the third of the month; would you look at the length of that urban snow fence!

Urban Snow Fence by gravy111 November 27, 2010