a. Anyone who uses more than 5% of the examples of "words" presented in this dictionary when addressing another person.
b. Someone too lazy to learn proper grammar, thus needing to create fragments or unnecessary augmentations of established words when struggling to communicate.
c. A person who makes up words to describe events, emotions, objects, actions, etc. Usually done in an effort to sound original or intelligent - see separate entry paradox
Person 2: Hey, I would appreciate it if you didn’t use that word around me anymore. When you use "retarded" as a synonym for "stupid" or "idiotic," you are saying that all people with intellectual disabilities are stupid, and that’s definitely not true.
a great use of time, able, accounted, acting of own age, active, active mind, acute, adequate, admirable, adored, adult, ahead of schedule, alive, altruistically, always fresh, always in motion, amazing, amazing, amazing mind, animated, applaudable, applicable, appreciable, assertive, availing, aware, awesome, bargain, beautiful, beautiful, believable, benefactor, big, big time, blended, bold, brainy, brainy, brand new, brave, breathable, bright, brilliant, brilliant, calm, careful, certain, character, cherished, civilized, clean, clear, clearheaded, clear-minded, coinage, colorful, comforting, commendable, committing, communicative, competent, complex, conceivable, concerned, confident, congruous, consequential, considerable, contemporary, continued, convincing, cool, cooperative, correct, courteous, credible, crystal, cultured, cute, dear, decisive, deeply meaningful, defiant, deliberate, developed, different, different in the best of ways, directed, discrete, distinguished, dove, driver, educated, effective, effectual, effectual, empathy, endless, energetic, enjoying life, enlarging, enormous, enticing, equal, essential, essential, esteemed, excited, exciting, experienced, expression, expressive, , extraordinary, fabulous, factual, famous, fashionable, fashioned, fast, favorite, feathery, fecund, fertile
If you want to tick off a politically correct person, just say it. They think it's mean because people with mental problems are not always stupid, except you can't call those people "retarded" in the first place, and nobody cares anyway. Plus, once again, it's from the Latin word for "slow".
Guy 2 to Guy 3: Look at Guy 1 dancing like he's retarded.