Whatever thing Gordon Freeman is. Someone who's really quiet, but strong.

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

Lambda males are the Betas or Gammas in middle school, but puberty hits like a truck when they get to high school, and end just getting constant female attention. Not uncommon for them to get laid twice on Friday night. They normally abandon their former Beta or Gamma friends, and will end up pissing off Alphas when their charming good look win over their girlfriends. Lambda males are the guys who aren't really liked by the guys, but that's mostly because they envy how much they're getting laid.