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1.
Russia's male population has been decimated throughout history through political upheaval and war. Poor but resourceful Russian women have engaged in the practice of freezing their shit and using the frozen dildo to pleasure themselves.
Sasha's "Siberian Express" will be boarding in 5 minutes.
by Zorba44 February 11, 2009
 
2.
A sexual punishment named after shipping political prisoners to Siberia by rail. This act involves inserting something cold or frozen anally (we prefer Popsicles). The recipient then gets gagged and locked into a box, case, or trunk. The container is then pushed or propelled down one or more flights of stairs.
I gave that bitch a Siberian Express for dessert because dinner wasn't ready on time.
by GU NIT February 03, 2012
 
3.
a period of cold weather
Our state was right in the middle of a Siberian express.
by The Return of Light Joker September 23, 2010