twitcher is a slur used to disrcimate people with illnesses like parkinsons and tourrette because of their uncontrollable muscle movements
person 1:'hello twitcher'
person 2:'its not funny to call me a twitcher because i have parkinsons'
by a_germandude January 8, 2021
Male who is so passionate about bird-spotting her will rush anywhere in the UK at a moment's notice just to see some rare bird.

See also: trainspotter
"We got to the gig only to find that the car-park was full of bloody twitchers looking for some fr*ggin' cuckoo."
by Nupe January 7, 2004
When a fully grown man says he has a vagina and when you turn round he has forced ball n all through his legs just leaving his pubic region visible, we all laugh.
If he were then to turn round, open his legs and force his penis back in the opposite to natural direction (his genitals would now be upside down,balls on top) and repeat in quick succession. His manhood would be twitching and therefore making him a Twitcher.
" Go on Pie, do your twitcher you fat flatulent bastard"
by Jebusmoore November 5, 2007
(NOUN - OCCUPATION) Someone who live streams to frequently (similar to how people who post videos on YouTube frequently are known as "YouTubers").
PERSON 1: "What is your occupation?"
PERSON 2: "I'm a Twitcher."
PERSON 1: "Really? What's your Twitch channel?"
PERSON 2: *gives PERSON 1 the URL for their Twitch.TV channel*
by Draycos Dragon May 23, 2020
A gaming term to describe someone who plays games that typically involve very fast paced action and require excellent reaction times to master.

Classic arcade games such as Missile Command and Defender require quick reflexes. Unreal Tournament and Quake are more contempory examples.

Typically with these games, you have little time to think. Some players will be operating purely on instinct. The rapid movements they make is where the name comes from. The player will be twitching as they operate the controls.
John: Damn, I thought I was good at Tekken and then I played that Japanese kid.
Sally: He doesn't do anything but drink Jolt Cola, play that game and sleep. He's a twitcher.
by Thepreacher August 14, 2006
A person who sits on twitch all day watching a streamer and modding their chat. For example LandonGodly
by Duhrhhe October 30, 2020