Something so FANTASTICALLY stupid or retarded, it ceases to be fantastic and thus becomes tardtastic! Lengthen the 'A' in tard for a more dramatic effect.
"It's a TARDTASTIC day today!"
"This photocopier is acting completely tardtastic today!"
The master of a retard, as commonly seen in public schools since the initial passage of the Individuals with Disabilities Education Act, which mandated the inclusion of retards into standard education settings. These retards need constant individual supervision from tardmasters.
"Dude, did you see that retard flip his shit in gym earlier? His tardmaster had to take him down!"