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To be supreme in all capacities, particularly as it relates to being cool and/or kidneys. May also involve water.
That guy is so renal, how did he get up there?

My girlfriend left me for a guy that had better kidneys - she said i wasn't renal enough.

Your car is wicked renal - it runs on water?! nothing like those cystic dinosaur burners.
by t.donia October 17, 2007
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2
To be rebelliously sassy.
My phone is so renal, it corrected 'rebel' to renal.
by MourningMugblood May 25, 2016
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