a person who shows no proficiency in the use of information technology—USA, 1998—from ‘techno-’ in ‘technological’ and ‘technology’, and ‘-saur’ in ‘dinosaur’, i.e., a person who is unable to adapt to change
the Jerusalem artichoke—UK, 1968—blend of ‘fart’ and ‘artichoke’ in ‘Jerusalem artichoke’—refers to the flatulence caused by eating Jerusalem artichokes
USA, 2003—a group of people organised by means of the internet, mobile phones or other wireless devices, who assemble in public to perform a prearranged action together and then quickly disperse
USA 1813—a heavy metal ball secured by a chain to a person’s leg to prevent escape or as a punishment—figuratively, mid-19th century: anything seen as a heavy restraint, especially the matrimonial bonds
to put someone in a difficult, vulnerable or compromising situation, especially by exposing them to blame—USA, 1945, sports—the image is of suspending wet washing in the open so that it can dry
a gesture (made by a French person to deny responsibility, knowledge or agreement) consisting typically in shrugging one’s shoulders while upturning one’s hands
an impressive facade or show designed to hide an embarrassing or shabby fact or condition—1843—from the sham villages said to have been built by Grigori Potemkin to deceive Catherine II
to undertake a dangerous or hazardous operation or activity—UK, 1867, as ‘to tickle the dragon’s nose’—‘to tickle the dragon’s tail’ was used of a nuclear experiment at Los Alamos during WWII
the practice of filling appointive public offices with friends and supporters of the ruling political party—USA, 1834—from “to the victor belong the spoils of the enemy”, used in 1832 by Senator William Marcy