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1.
Chi-beria is what Chicago turns into when it gets really fucking cold. I mean like -400 degrees. So cold that you legitimately question whether you are in the 3rd largest American city or on the frozen tundra of Siberia.
When a polar vortex rolls through the Midwest, you know all the schools are closing in Chi-beria.
by jmarteeeeen January 08, 2014
 
2.
Chi-beria is a term coined by NWS meteorologist Ricky Castro (on his way to work) before the 1/6/2014 polar vortex outbreak. The City of Chicago and greater suburban areas reached AIR temperatures at around -15 degree Fahrenheit. Combined with even colder wind chills of down to -50 degrees Fahrenheit and about a foot of snow, social media controller for the NWS decided it would accurately depict the severity of the upcoming weather and cause people to take precaution. The word went viral via hastags (#) and became to be used as a term to describe Chicago during periods of extreme cold weather. Simple etymology consists of combining the names "Chicago" with "Siberia". It means conditions for the city will or currently rival conditions of Siberia, notorious for extreme cold and snow.
"Man it's cold today in Chicago"
"yeah, welcome to Chiberia dude"

"With temperatures staying below zero for over 48 hours, you wouldn't be able to tell if you're in Chicago or Siberia. Perhaps you're in Chiberia"

"Chicago experienced the biggest chill in nearly 20 years. We’re talking (feels like) tempeatures of -40 to -50 degrees. Keep warm, Chicago! #Chiberia"--fox chicago news
by chiraqimofoo January 25, 2014