Tarded up
Extremely retarded, unbelievably retarded to point of fucktardation or worse.
Jeez, look at that tarded up loser, he can't even talk so you understand him.
fuck-up tard
a complete and utter loser(a guy likely) who attempts to sleep with 2 best friends within 1 week of each other; fuck-up tards continue to be made fun of years later since they are such complete and utter losers!; aka Mohktar or Mucky
"Man....what a fuck-up tard he is!"