One part creep and one part retard. A Creeptard is known to talk very loudly and get suffer emotional distress when made fun of. Creep stalks bartender for months before finally finding her on facebook. Creep writes long stalker message to add him while unknowing becomes a retard because his girlfriend learns of his facebook update. Creeptard is then barred from the bar and loses only girlfriend he's ever had.
Noun: This creeptard keep following me around.
Adjective: Did I hurt your creeptarded feelings? Go cry to yo momma.
Adjective: Your girlfriend found out you're stalking some chick? You're fucking creeptarded