to get excited, annoyed, angry—Australia, 1923—maybe based on the image of a person who, while riding a bicycle, gets provoked by another person: the cyclist would then dismount and respond to the provocator
children, especially siblings, should not argue among themselves—UK, 1818—alludes to Love between Brothers and Sisters, in Divine Songs Attempted in Easy Language for the Use of Children (1715), by Isaac Watts
an easy target, i.e., a person who, or thing that, is defenceless against an attack or other danger—first used in 1936 & 1937 by the Canadian journalist Gordon Sinclair
literally (UK, 1803): of a firearm: equipped with a hair trigger—hence, figuratively (Ireland, 1853): reacting immediately to the slightest provocation or cause
UK, early 19th century—the noun ‘corkscrew’ is used as a modifier, with the sense spirally twisted, in the expressions ‘corkscrew curl’ and ‘corkscrew ringlet’
UK, 1851, as ‘haw-doovers’—humorous and colloquial alteration of ‘hors d’oeuvres’, plural of the noun ‘hors d’oeuvre’ (i.e.: an extra dish served as a relish to whet the appetite usually before the main meal)