verb (used with object)
1. To make slow; delay the development or progress of (an action, process, etc.); hinder or impede.
verb (used without object)
2. To be delayed.
3. a slowing down, diminution, or hindrance, as in a machine.
4. Slang: Disparaging .
a. a mentally retarded person.
b. a person who is stupid, obtuse, or ineffective in some way: a hopeless social retard.
5. Automotive, Machinery . an adjustment made in the setting of the distributor of an internal-combustion engine so that the spark for ignition in each cylinder is generated later in the cycle.
A great example of "retard" in the EVE online community would be someone named Ocean Water. Also known for looking to share time with men as quoted below.
19:51:02 Ocean Water > Ocean Water I suggest you go out side look around find a man to share time with
20:55:39 Ocean Water > Ocean Water LLLOK uP LRRP READ before showing how much of an idiot you really are