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Girls in their late-teens to 20's who utilize streaming services such as Twitch in order to flaunt their giant breasts to a large following, mainly consisting of horny men and 12 year old's who have never masturbated before. Usually they would play mainstream video and PC games in order to increase the boner-factor, as many of their followers have never been laid before. Some titty streamers may also place their leg on their chair in order to demonstrate how gorgeous they look.

While some titty-streamers are lovable and enjoyable, most of them are fakes who seek male attention.
Titty-Streamer: "Hey guys, it's (Username) here, love y'all. Please consider donating to me. Today, we'll be playing Counter Strike G.O, let's do this" *Lifts leg onto chair and checks if chest buttons are undone*
by FinklerZ November 07, 2017
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Females who livestream on a a major streaming platform and flaunts/exploits their hot bodies in order to gain views and donations.
God, I'm happy that Twitch decided to start cracking down on the titty streamers, now Scarce won;t have to cover on all of their wardrobe malfunctions.
by Onion_Boy.png March 11, 2018
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