A person who does very stupid things, a dimwit.
This word is a contraction of "Cupid Stunt", who was a character on the
Kenny Everett Show in the 1980s. This in turn is a spoonerism of "Stupid Cunt". The expression is used by
people who watched TV in the 1980s, usually to describe people who were born after show'
s popularity waned and are therefore unfamiliar with the expression.