A boothmaker is someone who sits in a booth or stall (usually at an expo or similar) trying to get people interested in the products they sell, so they can make a sale.

They sit down with you and explain everything, give demos, and most of the time, offer to come to your house.

Once you give them your info, they rarely will leave you alone.

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