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2.
A tidal wave of heavy, packed snow, plowed onto your driveway by a city snow plow truck, and usually just shortly after you have spent a couple of hours shovelling out your driveway by hand.
Man, that city public works dude almost buried my Honda with a snownami...
by DGMT April 01, 2008
 
1.
When it is snowing so damn much you cant even see a thing.
OMFG, it's a fricken snownami outside!
by Sexa February 22, 2009
 
3.
When snow and wind come together in waves
The weather in Virginia the past few weeks has been brutal Last week we had a snownami.
by LadyDi0003 February 15, 2010