quitchgrass

(obsolete) simple past tense and past participle of twitch

plural of twitching

A brief, small (sometimes involuntary) movement out of place and then back again; a spasm. / (informal) Action of spotting or seeking out a bird, especially a rare one.

couch grass (Elymus repens; a species of grass, often considered as a weed)

(intransitive) To perform a twitch; spasm. / (transitive) To cause to twitch; spasm. / (transitive) To jerk sharply and briefly. / (obsolete) To exert oneself.

The state of being twitchy, physical restlessness. / The state of being nervous and unsettled; edginess.

A small passerine bird, Linaria flavirostris (syn. Carduelis flavirostris), that breeds in northern Europe and across central Asia.

Someone or something that twitches. / An eager birdwatcher who is willing to travel long distances to see rare species. (See the Wikipedia article for origin.)

susceptible to twitching a lot. / (figuratively) irritable, cranky