sisty 

when someone acts jelous

yo..she actin mad sisty because you go out with her ex

sisty by Keeshia May 13, 2005

Sisty Uglers

A spoonerism for "ugly sisters." Originally referring to the characters in Cinderella, this fun little phrase can be brought out whenever you have to refer to a friend or loved one's less than charming female siblings.

1. (usage for a lover) "Oh Crap, I promised Bob I'd spend Christmas with him, but I didn't realize his Sisty Uglers would be there too."

2. (Usage for a friend) "Jane, you know I think you're awesome, but your effin Sisty Uglers always give me attitude."

Sisty Uglers by Kay Tor June 6, 2009

Plump Sister 

A woman who has put on a few pounds since the last time that a random 72 year old Uncle will say to Larry, the cousin twice removed, this kind of thing:

Uncle: "Golly! That's Suzanne? She has gotten to be a real Plump Sister since the last time I saw her."
Larry: "Must've been back in the Seventies. Before the kid. Kids. Who knows."

Uncle: "It was May 1979. When they got married...wow she just blimped out!" Larry: "Total butterball. Plump Sister, shame."

Plump Sister by MissPriss9 January 12, 2019

Sister X 

The sister with the most not-relative-siblings in Vietnam.

- Do you know sister X?
- Of course, she's the one with the most siblings in Vietnam.

Sister X by Bé Iu Của Chị X April 23, 2021

Time To Chuck My Muck Over Your Sister's Jubblies 

A politer way of saying to a friend, i'm going to fuck your sister then sloppy jizz over her tits

Dave: Bobby, since you wouldn't make me a brew its Time To Chuck My Muck Over Your Sister's Jubblies

Time To Chuck My Muck Over Your Sister's Jubblies by Greg_the_Smeg February 7, 2019

sissygasm 

Hands free orgasm, usually obtained by being pegged by a strap on or dildo.

Madam gave me a sissygasm while she fucked my ass with her big, black dildo.

sissygasm by kinky19014 May 14, 2016

SISTASTIK 

A COOL ENHANCED version of a sister who is SUPER AWESOME..SISTASTIK

Sis you came through..SISTASTIK
Sister my forever friend SISTASTIK

SISTASTIK by ClassicRonnie June 15, 2019