Rootbeering 

Burping into the vagina while performing oral sex.

Steve: Hey Rick, how was last night?
Rick: Well, I was eating Stacie out, but I ended up rootbeering her.
Steve: How'd that go over?
Rick: Not too well, actually.

Rootbeering by A&W_Lover November 19, 2013

Rootbeerio's 

When you get a bowel of Cheerios and put rootbeer into it.

Guy 1: Woah dude did you put Cheerios into your bowel with root beer?!
Guy 2: Yeah man, you should try it! Its called rootbeerio's!

Rootbeerio's by Sidewhore January 30, 2018

Rootbeerian 

A Rootbeer lover on the Rootbeer quest, which involves going into diners and fighting with Obnoxious Waiters and Waitresses who believe Rootbeer is just another soft drink.

Obnoxious Waitress: I'm sorry but we don't have an Rootbeer, but we have Coke.
Awesome Rootbeerian: Are you kidding me? I'm a Rootbeerian! Coke is not even remotely similar to Rootbeer!

Rootbeerian by Rootbeer Comedy on tumblr May 29, 2010