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1.
Water-dwelling micro-animal with eight legs.
Quite possibly the toughest animal in nature.
1: Tardigrades can survive 10 years without drinking water.
2: Tardigrades can survive in outer space.
by Redtail September 11, 2014
 
2.
The only grade considered worse than an F in many schools.
Teacher 1: If Dave doesn't start to do his work, he'll end up with a tardigrade.
by Sepcial ED December 09, 2010