An adult, most commonly a male, who has never fully developed or matured emotionally and is characterized by a low degree of self awareness, awkward interactions with other people, a lack of empathy and an inability to achieve intimacy.
Gary: "Ken, I hate to be the one to tell you this but Uncle Gilbert has cancer."

Ken: "More cottage cheese and peaches."

Gary: "Excuse me?"

Ken: "More cottage cheese and peaches. Bring me some."

Gary: "Ken, dude, you are emotionally stunted."
by AYYFRON March 15, 2011
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