noop stands for "No Operation"; it means something that does nothing. It can also be written as "no-op".

Intelligence agency term for "psychological operation". A government or corporate-sponsored operation, usually taking the form of a "terrorist attack" or "crazed gunman on a spree", with the intent of panicking the public into demanding more police and laws inhibiting freedom. Psyops are usually carried out by drugging a civilian or group of civilians with aggression-promoting drugs, psyching them up, arming them, and sending them out to commit mayhem. Government-sponsored terrorism. See also blackshirts, conspiracy

(pronounced 'no op', from NOP the computer assembly language instruction that tells the computer to do nothing)

Loser; a stupid or lazy person.

An afternoon poop; Commonly taken at the end of a lunch break as a result of food and continuous coffee consumption; Sometimes referred to as an '"afternoop."

Not to be confused with a moop.

An utterly useless co-worker. This is much worse than clueless as the clueless can often be trained to become cluefull. Also written as 'no-op'.

How Russian people say "noob", especially in games such as CS:GO and Dota 2

spooning backwards; when the girls spoons the boy