- adjective relating to the post
- noun a size of board which is not an ISO size
- adjective uncontrollable, irrational, disoriented. This vogue term among Californian adolescents was popularised by the 1994 US film Clueless. It often occurs in the form go postal. The term is derived from the image of deranged postal workers who embark on a shooting spree before committing suicide.