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1 definition by Steve Rado

 
1.
Costarican slang. pronounced: to-wah-nees. Used to describe something cool. Synonymous with pura vida. Possibly derivative of english phrase "TOO NICE", from Costa Ricas' Gulf coast Jamaican descended population in Limon.
Esa pelicula estuvo de lo mas tuanis.

That movie was awesome (or too nice).
by Steve Rado September 10, 2007