Used when someone blindly and aggressively defends a position and is proven wrong in an embarassing manner.
The origin of the word was mid 80s in San Francisco when a young boy prodigy corrected his older cousins on a playground.
The original phrase he spoke out were “you’re
moded , corroded, your
little butt exploded”
The people around laughed and were
astonished with the saying. For a few years the entire saying was used. Later people just used “ you’re moded” and dropped the rest.