A person who possess chromosomes that make them appear retarded. These people usually also have an unusually low IQ(under 80)
can be brought on by genetics.
parents are usually former/current druggies.
these people sometimes drool in public.
Eric: Go get me some wood glue.
Tom: what do you do with wood glue? does it taste good?
Eric: You are such a chromo-tard.
Steven: yeah dude, your fucked up.