Sister switcher 

A boy who dates/talks to a girl in an apartment, but after the relationship has ended, proceeds to date/kiss/pursue said female's roommates.

See also homie hopper

Roomie 1: I'm so over that fool.

Roomie 2: I made out with him..
Roomie 3: Me too...
Roomie 4: THAT BOY IS A SISTER SWITCHER.

Sister switcher by Piriguetinha May 20, 2016

Sister Switcheroo

A group of LGBTQ nuns.

Gee those fags are dressing like catholic nuns. I believe it is the Sister Switcheroo.

Sister Switcheroo by The RONA Wigger October 3, 2023

The Sister Switchero 

A limpy wristed fag that dresses like a girl while attending the gay pride parade.

Gee, that cross dresser is confusing. It looks like he's been confused by The Sister Switchero.

The Sister Switchero by Mr. Homophobia May 28, 2023

The Sister Switch (T.S.S)

The sister switch also know as the roomate switch because it applies to roomates and sisters. You find out your girlfriend’s sister/roomate is the more desireable one and you want to switch. How you do it is you suggest a threesome with the sister/roomate to your girlfriend and she is so appauled by the idea she kicks you out. She later vents about to the other and she is secretly flattered why giving fake sympathy. You wait until you girlfriend is at work and you call the sister/roomate. You get past the awkwardness then you ask her out.

There is an alternate scenario where your girlfriend is into it and the sister/roomate is too. In this case you either are very lucky or offered to aide in incest where you are expected to decline.

S6 EP12 of Seinfeld Jerry attempts The Sister Switch (T.S.S) with his girlfriends roomate and gets offered threesome and declines because he’s secretly gay.

The Sister Switch (T.S.S) by uvogin August 23, 2023