(pl. n., used with sing. or pl. verb): a spontaneous condition characterized by extreme discomfort & experienced by people in awkward situations; retard tingles occur in embarrassing circumstances including but not limited to: inappropriate laughter at ethnic jokes while person from said ethnic group is present, calling your teacher ‘mom’, walking in on your boss in the bathroom, and scenarios in most Ben Stiller movies.
Ending a phone conversation with ‘I love you’ when you are not talking to your significant other can cause severe retard tingles for the person on the other line.
Mike Myers exhibited symptoms of retard tingles - shifty eyes, nervousness, blushing - when Kanye West said “George Bush hates black people” during a telethon on live TV.
Your fart was so loud that the entire movie theater got the retard tingles!