A non-existant word that mentally challenged people often confuse with the word "rampant."
Jack: The disease ran rampid throughout the country.
Jill: Rampid is not a word, you moron.
Jack: Pirated music is rampid in the Internet.
Jill: Are you really that stupid?
the act of something growing very fast; or spreading through an area quickly
The disease ran rampid throughout the country.
Pirated music is rampid in the internet