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The act of going out with one roommate, then realizing you like the other one more and wanting to switch. However, if you simply break up with your girlfriend her roommate will be too loyal to her to go out with you. So you request a menage a trois to your girlfriend, and she will be so offended by the fact that you're attracted to her roommate that she will break up with you. Then she will tell her roommate, who will understand that you like her. Your ex will not be against this in any way, because she was the one who dumped you. You will have successfully performed the roommate switch.

Made popular by Seinfeld.
Jerry: I want to go out with his girlfriend's roommate, but I can't think of a way.
George: You should try the roommate switch.
by WhileyCoyote April 25, 2010
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roommate sex

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When you've had sex with one person in a household and then on another occasion, have sex with another person of the same household, possibly with or without the knowledge of the two parties. Not to be confused with an actual threesome.
Example 1: "So then I walked into his apartment and realized, 'Shoot, I've been here before. I was here last when I was hooking up with his roommate.'" Example 2: "So the two of them actually know each other." "Damn, roommate sex."
by keneticmotion December 5, 2013
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When two couples are having sex in the same room, switch partners after finishing and then repeat the act.
"Dan and Colin always pull the roommate switch after parties."
by Stephen Vassen January 11, 2008
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Roommate Swept

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When your roommate and you get with the same girl at different times. You sweep the girl.
Yo dude whats good?

We just roommate swept some chick
by thedude1013921 April 21, 2010
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roommate stalker

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An idiot that goes an looks for someone when they know exactly where they are at
My roommate stalker drove all over the city looking for me after I was MIA for 6 hours.
by anonymous February 4, 2023
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New Roommate Syndrome

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Also known as NRS, this temporary loss of reality occurs when you invite a good friend to move in with you. For a brief period anything seems feasible, and impossible promises like "you can borrow my car" and "I'll help you buy things" are made in a haze of idealism. The potential roommate is quickly infected (this syndrome is highly contagious) and takes on the same delusions. Symptoms begin wearing off after several weeks and than fade completely when the individual is ejected and you never speak again.
New Roommate Syndrome Sufferer: Stop racking your brain looking for places, you can come live with me!! Rent is cheap and I can give you a ride to work now that we'll both be living in the city!!
NRS Sufferer 2: That sounds great!! I can sell my car and quit my second job!!
by Can'tMessWitSmitt July 2, 2017
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Shitty Roommate

The shitty Roommate is a male/female who brings utter disgrace to the living quarters and should be avoided at all costs. He/she encompass the characteristics and personality traits that fully display their lack of integrity as a citizen of society. Shitty roommates generally:

(1) do not clean their dishes (sometimes no dish cleaning for months)
(2) has a messy room
(3) Do not take out the trash
(4) Do not clean up after themselves.
(5) Makes excuses for his/her irresponsibility and failings
(6) Exaggerate their excuses
(7) Insist that they are extremely busy as an excuse to not be responsible for their mess.

The archetypal shitty roommate will insist that they are Always busy. Yet he/she will stay up countless hours (10+hrs) playing videos games or watching netflix as opposed to spending 20 minutes to clean their horrendous pile of dishes, take out the trash, and/or other responsibilities. At the end of the day the shitty roommate is an irresponsible humiliation to society.
Shitty Roommate: “Dude, I just got Star Wars: Knights of the Old Republic! I’m gonna be playin that shit all night, cuz I’m a nerd! LOL”

Responsible Roommate: “Hey man, I just wanted to let you know that it is actually hazardous to your health to not clean your dishes.”

Shitty Roommate: “Dude, I’m busy. I don’t have time to do the dishes.”

Responsible Roommate: “Oh is that so? Well, I just wanted to bring it up because the dishes haven’t been done in a month.”

Shitty Roommate: “Stop trippin! I’m freakin busy dude! I got 3 papers to write.”

Responsible Roommate: “Are you really that busy, man? Two days ago you stayed up playing Mass Effect for 10 hours. Yesterday you watched Netflix all night. With all due respect, I think it’s only reasonable that you to take a simple 20 minutes of your life to clean your dishes.”

Shitty Roommate: “Dude when you have to write 5 papers then you’ll know what’s it’s like to be busy.”

Responsible Roommate: “First you told me you had to write 3 papers. Now you’re saying you have to write 5 papers? Ya know, I’m a full time college student too, and I also work practically full time. I wrote 2 papers this week in between working 35 hours for the week. The bottom line is that you’re a shitty roommate. Be a Jedi knight and do those dishes!”
by ShutDownSarcasticAssholes August 13, 2012
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