Retarculous was originally coined by To Catch a Predator decoy, Emily Bicks. It is a conjunction of 'Retarded' and 'Ridiculous.' It is used to describe something that is extremely dumb, stupid, etc.
by Briggs Bennigan January 12, 2019

Both retarded and ridiculous
by squid September 26, 2003

by epistocratles December 18, 2010

by madden May 13, 2005
