1) To improve something retarded, making it more retarded (See uptarded)
2) Something that has been added to something else to make them form into one big ball of retardation.
3) A retard who does things that make he or she more retarded each day.
The plustard got hit by a parked car.
Incorrect french verb for being later than
Marc arrives 9:05, 5 minutes late.
Marc: Sucre-Bleu! Je suis en retard!
Jacques arrives at 9:06
Jacques: Je Plustard Marc! Je parle merde Français. Je suid un retardé