Kiss your sister 

Stealthiest way of telling someone else to kill themselves.
Kiss your sister = kys = Kill yourself

"Go kiss your sister"
"But I'm an only child"
"You know what I meant"

Kiss your sister by Fickt June 25, 2022

kiss your sister 

Nothing exciting; not good or bad. Often an expression used when something good offsets something bad, and you come out even, i.e. in card games where the points for a hand may split evenly.

How was your day?

Eh, you know, kiss your sister. A little up, a little down.

kiss your sister by bc73 December 14, 2010

Kiss Your Sister 

Peeing in the shower.

I just cleaned the shower, so don't kiss your sister!

no more kissing my sister, you.
(laughs) What? Huh? Hmm? Um, that's an expression for peeing in the shower.
I'm not gonna pee in the shower anymore.
Why? Why doesn't he get to do that? Yeah.
Yeah, that's true.
Why can't I? And why bring it up now? It goes right down the drain.
You know what? Let's all kiss our sister.

Kiss Your Sister by Bexar86 May 12, 2015

National Kiss Your Step Sister Day 

On June 9th it is considered to be National Kiss Your Step Sister Day. On this day it is highly recommended that you make out with your step sister. Any other day it would be considered incest, but on June 9th it is encouraged!

Person 1: Bro on June 9th you gotta make out with your step sister.

Person 2: Why June 9th?
Person 1: Cuz it’s National Kiss Your Step Sister Day, duh.

National Kiss Your Step Sister Day by yomommathic April 18, 2020

Ian you kiss your sisters cat with that mouth 

Ian you kiss your sisters cat with that mouth: It means when a guy like **Ian** Kisses a cat that belongs to his sister.

Dude 1: Ian you kiss your sisters cat with that mouth?

Ian: You know it!

Ian you kiss your sisters cat with that mouth by #BecomeAPlayerToday March 30, 2021