mentally innocent

Mentally Innocent (adj.) A euphemism for "retarded," "window licker," "dumbshit," etc. Mainly used to insult other individuals who are not truly mentally challenged but make poor decisions.

Drill Sergeant 1: "We were just told that we couldn't call you retarded anymore."
Drill Sergeant 2: "Yeah. So we're now referring to ya'll as 'mentally innocent'."
Unidentified Soldier: -- laughs
Drill Sergeant 1: "What mentally innocent fuck just made noise in my formation?!"
Drill Sergeant 2: "Half-right face!..."