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1.
The act of carefully rearranging items in the refrigerator in order to make more things fit. Particularly applicable to students and others with small or starter fridges.
Bob brought home two sacks of groceries and now we have to play fridge tetris or it's all going to spoil.
by Alan Wexelblat June 14, 2008
 
2.
The act of rearranging geoceries in your refrigirator so more can fit in.
Oh man, my trip to the grocery store was so massive, I had to do some fridge tetris when I brought it all in.
by Guyskiy May 31, 2009