Skip to main content
Pronounced (sis-um)

A childs parent is both their sister and their mother.

This word derives from the combination of two words sister and mother. The words used is the short form of each words which is sis and mom. The second meaning of sister which is a female offspring having only one parent in common with another offspring. Mom which means 1. A female parent.
The father of the offspring is also the father of the daughter which makes the female parent both the sister and the mother to the offspring. The sister and mother (sisom) is the offspring’s half sister and mother.

"In incest families common found in the southern states of North America sisters of brothers are also found to be their mothers."

"Bobby Joe who is Billy Bob's sisom recieves notice to attend the parent teacher conference on parent teacher night."
Sisom by UrbanPhonics October 28, 2012
Urban Dictionary Merch
Your favorite words on things you can wear, drink from, read, or give to a friend.
The Urban Dictionary Store sells gifts you’ll have to explain.
An extremely bad pronunciation of the German 7B (Sieben b), caused most of the times by indianness.
Dude, did you just hear Janani say Sibombe to the waitress? She was totally shocked!
Sibombe by iamclearenough October 30, 2013
Related Words
"Sisoy" is a new popular expression used by teens around Spain that popularized TikTok.
It is a contraction of two words: si (yes) and ser (be).
The meaning might be subjective and vary from places, but it mainly means <<Me too>>,
expressing that you correlate and feel identified with the things that someone mentioned.
Note: this word is highly hated by many people so use it wisely.
Example 1 (Spanish):
-He suspendido tres asignaturas, ya no de que hacer para aprobar
-Sisoy😹

Example 2 (English):
-I have failed too many tests, I think I'm gonna just get a sugar daddy

-Sisoy
sisoy by Picsaconpinya March 10, 2021
"Suck It Out Of My Ass"
Let me tell you something. Here at Apple we have a standard response for this kind of request. It's called siooma. Have you heard of it?
siooma by DudeAbides August 17, 2007
The Sisodia are an Indian Rajput clan, who claim Suryavanshi lineage. A dynasty belonging to this clan ruled over the kingdom of Mewar in Rajasthan.
Maharana Pratap is one of the most notable Sisodia rulers
Sisodia by TheBannaSa May 17, 2018

sisolation

A shortened and much more efficient method of saying self isolation.
I' ve got a bit of a cough, so I put myself into sisolation
sisolation by Jones the Steam April 5, 2020
If you ever get one tell me.
Tiffany,Nicole,Brittany,Amber,and Kayla all had a sixsome with Johnny.
sixsome by Johnny2468024680 October 4, 2006
More from Urban Dictionary

briefcake 

"Did you check out the briefcake in courtroom C?"
briefcake by Ben Frey April 6, 2006
Word of the Day on November 3, 2026
Brought to public attention by Bob Woodward and Carl Bernstein in the book on the fall of Richard Nixon, All The President’s Men, ratfucker was Nixon’s term for a political operative who sows chaos among opponents; an agent provocateur. It is thought to have originated among campus political rivalries at USC, and seems to have some usage in the US military.
Along with Nixon’s other ratfuckers, Roger Stone caused fights at otherwise peaceful Democratic Party protests to generate a false narrative that the Democrats were violent and dangerous.
Ratfucker by Ricky Ramjet November 2, 2017
Word of the Day on November 2, 2026

countrypolitan 

Term used to describe someone who is a mix of both rural (country) and urban (metropolitan) lifestyles/upbringings. He/she is typically equally comfortable in both settings and is able to seamlessly slip back and forth between the two, appreciating the characteristics of each.
That ol' gal of mine drives the 12 lane freeway during the week and a John Deere on the weekends. She likes opra and the Grand Ol' Opry. I love them countrypolitan women.
countrypolitan by MOChick November 7, 2006
Word of the Day on November 1, 2026

Witch Bath 

A bath consisting of a variety of slats, oils, soaps or any other added ingredients such as fruits, milks, herbs or any other spices for health or beautifying benifits.
She brought home alot of stuff and took it to the bathroom. She must be taking a witch bath.
Witch Bath by carnieboy30 October 26, 2020
Word of the Day on October 31, 2026

kinktober 

An excuse for people to write porn with different types of kinks throughout the month of October.

Smut Fanfiction
That chick doesn't write often but when she does, its for Kinktober.
kinktober by Kinkiest July 12, 2018
Word of the Day on October 30, 2026

proper lad 

a lad that is such a lad that he is a proper lad
person1:did you see bob
person2: ya he was a proper lad
Word of the Day on October 29, 2026
Load more