sibless

Only child, i.e. without bothers or sisters.
No siblings.

My "sibless" son is sometimes lonely without brothers or sisters.

sibless by George Rouail October 15, 2010

Subless 

One who is without a sub, or otherwise without the sensation of deliciousness on their taste-buds. Usually an adjective to those who cannot afford a 5 Dolla foot-long.

Damn this girl is so poor, she subless.

Subless by thisdude20001 May 5, 2010

Sixless 

The biggest simp on planet earth. Sixless is a ‘pro’ pubg mobile player who dyes their hair pink. He has an egirl who only talks to him because of his pubg mobile clout. He is actually pretty bad and is just a walking, talking meme at this point.

Lol Sixless posted on twitter again and made himself look like a buffoon again.
Wow Sixless is megasimp yo.

Sixless by IndiaNO1 March 26, 2020

Sinless 

The cutest bean

Me: Sinless is absolutely adorable
Sinless: *Flustered Noises*

Sinless by Sparrowwashere May 21, 2022

sixless 

a bitch, a whole ass bitch. that is all.

what’s another word for sixless? a BITCH

sixless by itsbitchesbitchbitch July 13, 2020

sinless 

*To be found guilty on all charges of doushebaggery bullshit against your subordinates

* To be terminated on the spot or/and transferred positions in which your purpose is drastically limited or unnecessary

*Continueous recipient of the "Glass Bellybutton" award

I assure you, I/we will be found sinless.

sinless by Letmelivemyfantasy May 11, 2015

Siblets. 

A group of young people, which includes your own children, and/or children of former partner or partners, regardless of parenthood.

We are having a party and inviting all the siblets.

Siblets. by johnlephoto November 23, 2021