A synthesis of scary and stupid; often used as an adjective to describe reckless behaviour that is dumb and frightening.
"I didn't realize how scapid it was to join the army until I was on the front lines with a rifle."
by DFRussia March 24, 2008
1 more definition
scurrying rapidly;hyper in a scary way.
The camel spider was extremely scapid.
by momo August 04, 2004