(idiomatic, figuratively) A characteristic, possession, associate, or previous deed that hinders one's ability to succeed.

Someone who has completed all studies to become a nurse but is not yet certified as one.

(physics) The number of electrons in an atom or ion

plural of black-necked screamer

plural of name server

(Internet) A program or server that maps human-readable names to computer addresses, especially as part of the Domain Name System.

plural of night watchman

(Internet slang) Used to indicate that the speaker does not like something they have seen or heard.

plural of nut case

A hippie anti-war slogan encouraging love and peace.