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An otherwise normal person acting in an unusually retarded way, sometimes caused by excess sugar or late night binges.

Also can be used as a noun to describe the person.
Jason and Brian have been acting really tardsy lately and rolling around on the floor drooling.

Hey Tardsy, stop acting so fucking tardsy!
by Damien B. May 02, 2006

Words related to Tardsy

retard tard tardmo tardout tardsey tardy