Stupid is an adjective meaning lacking in intelligence. (See Stupidity) Stupidity is the property a person, action or belief instantiates by virtue of having or being indicative of low intelligence or poor learning abilities. Stupidity is distinct from irrationality because stupidity denotes an incapability or unwillingness to properly consider the relevant information. It is frequently used as a pejorative, and consequently has a negative connotation. Read more on Last.fm.