also: Derpid, Durrpid, Derrpid
adj. - Stupid, lame, idiotic or humorless. The faculty of acting retarded. Chiefly used to describe a person. Extra r's may be added to denote higher degrees of idiocy.
n. - A person described by the above adjectives.
From the root word "dur" or "durr," an
expression a moron / mentally
handicapped person would make or a general
expression of idiocy, stupidity or lameness/humorlessness.