noun
a portmanteau of 'snow' and 'armageddon', used to describe a severe or extreme snowstorm
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The city was brought to a standstill by the snowmageddon that hit last night.
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Dude, did you see the snowmageddon outside? It's crazy!
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I can't believe this snowmageddon is happening right now, it's insane!
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The snowmageddon of work emails flooded my inbox this morning.