Adjective used to describe one so retarded, they do not deserve the 're'

Any person who is not developmentally disabled, but rather has what is considered normal cognitive faculties but for whatever reason has opted out of using it. Whereas mental retardation is genetic in nature, this form of behavior is environmental usually resulting in too much daytime television, Brittany Spears piped in pop music, and other environmental factors.

A person who is retarded, but is realy a normal person just acting like one.

Simply, the plural form of the word tard. More than one tard.

Players, coaching staff, and fans of Melbourne Victory Football Club, based in Melbourne, Australia. They compete in the Australian A-League Football (Soccer) Championship.

The term has its origins in the club's player recruitment policy, which were widely seen as "retarded" by fans of rival cubs, and as the Melbourne team has no official mascot, the term "tard" became widely used by football fans Australia-wide.

The term stuck when the Melbourne football club's management appeared to be happy with poor on-field results.

Someone who acts unintelligent either purposely or accidentally.
Associating with someone mentally disabled and/or retarded.

Players, coaching staff, and fans of Melbourne Victory Football Club, based in Melbourne, Australia. They compete in the Australian A-League Football Championship.

The term has its origins in the club's player recruitment policy, which were widely seen as "retarded" by fans of rival cubs, and as the Melbourne team has no official mascot, the term "tard" became widely used by rival football fans Australia-wide.

The term stuck when the Melbourne football club's management appeared to be happy with poor on-field results.