Stereotipper 

...sigh...you know who I'm talking about...

Scenario: a certain group of people walks into the restaurant and sits down in your section. You turn to your fellow co-worker and mutter begrudgingly, "I hope they're not going to be stereotippers."

Stereotipper by Widdershins December 30, 2011

Genshin Impact Stereotyper 

Someone who calls Genshin Impact Players pedophiles with no evidence to back it up because they read it somewhere on r/shitposting.

John: Hey are you wearing a hoodie with Zhongli on it? You must be a pedophile then!

Keith: See, this is why you’re so annoying. You’re a Genshin Impact stereotyper

Genshin Impact Stereotyper by KatNotKit January 23, 2022

Stereotyper 

Someone who thinks a preson is x if they like, participate in, or even know about y.
Examples:
Thinking someone is a weeb because they watch anime.
Thinking someone is on any side of the political spectrum becase of a view they expressed.

Some stereotyper thought Jill was a hippy because she politly asked him not to throw his trash on the ground.

Stereotyper by The Other Other Person July 23, 2017

Stereotipping 

1) Generalizing a certain group of people into a characteristic that fits what society thinks... only not pronounced right.

2) The act of tipping over a stereo, usual by force or trickery

1) We are stereotipping people

2) Let's get loaded and go stereotipping!

Stereotipping by TFBC March 21, 2003