Soist 

The combination of the words "so" and "moist", which is used to create the adjective "soist".

This girl's feelin me, bitch is soist.

Soist by WillMartyr August 6, 2013

Soist 

Something that is so moist. Basically, this word is -so- and -moist- mixed into one.

Damn her pussy soist

Soist by myfirstdefwassoist May 24, 2019

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

Big Sisters & Big Brothers 

Organizations that pair young kids with older "brothers" & "sisters". They spend quality time together & it makes up for not having a Mom or Dad. Great for youngsters!

{Big Sisters & Big Brothers] are in practically every town & city nationwide.

Big Sisters & Big Brothers by Starchylde May 21, 2016

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

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