toxic oldest sister 

When ur older sister becomes an alcoholic/drug addict who is responsible for the collapse of their own social life and cant take care of their own kid because theyre too busy ruining friendships and familial bonds because they block you on social media and dont visit anymore :)

ahahaha my toxic oldest sister blocked my teenage sister on facebook today!

toxic oldest sister by ch!lly October 7, 2021

step-co-sister-in-law 

Spouse's stepsibling's wife.

My step-co-sister-in-law is a good person.

step-co-sister-in-law by Wonbig October 13, 2021

Eats his sister 

A euphemism for incestuous behavior, usually oral sex, with one’s sister.

“Alexander eats his sister every night.”

Eats his sister by RhodyRhodesRhodesia October 27, 2021

Kissn' my sister 

When you are in the shower and instead of getting out to piss, you piss in the shower causing it to go right down the drain.

Last night my wife caught me Kissn' my sister

Kissn' my sister by Bob Belchur January 13, 2022

thought brother/sister

If everyone was a thought brother/sister, there wouldn't be anyone more in charge than the next, there would be no hierarchy.

A thought brother/sister must be a dream to wake up from, since people seem to want a thought leader more than they want one of those.

thought brother/sister by The Original Agahnim February 2, 2022

Council Bluffs Sister 

Incestual Relationship; also applies to other family members.

"Where's Jim tonight?"
"Oh, he's out with his Council Bluffs Sister again..."
"Wow. Won't their kids have hooves?!?"

Council Bluffs Sister by Arrogant Joe March 14, 2022

Dean Big Sister H-Town Hottie 

The Oh So Diva, the Stallion of them All .

That My Dean Big Sister H-Town Hottie .

Dean Big Sister H-Town Hottie by Titi life March 23, 2022