1. characterized by retardation: a retarded child
2. relatively slow in mental or emotional or physical development
3. A level of intoxication that renders ones speach and motor functions similar to those who are mentally retarded
Kat: I am so retarded right now
Lille: yeah I know I am so the D word
Kat: the D word?
Lille: wait hahaha I mean the R word
Lille is so Detarded that she thinks retarded starts with a D