A stupid person.
A sideshow performer who hammers nails or similar items through his or her nostril into the nasal cavity; human blockhead.
To perform as a human blockhead.
To behave in a stupid manner.
A foolish or annoying person.
A reproach, gibe or taunt.
A person who twitters, i.e. chatters inanely.
To reproach, blame; to ridicule or tease.
To ignore or killfile (a user on a bulletin board system).