It’s when you fucking destroy your sister cause she’s a little prick.
“Ima fucking upper cut the shit outta you Stephanie

“Why?”
“Cause it’s National uppercut your sister day”
by MexiAlan October 30, 2019
mugGet the National uppercut Your sister daymug.

Your sisters a mister

Worse than “ur granny tranny” or “ur brothers a mother”. Every time this is said, the victim will implode into a ball of guts then blast into a shower of blood.
Joe: “Your gay.”
John: “Don’t make me do it.”
Joe: “Do what, pussy?”
John: “You’ve taken it too far.”
John: “Your sisters a mister.”
Joe: *Implodes then blasts out covering the walls in a red layer of blood and guts*
by ThatGuy286437 May 15, 2018
mugGet the Your sisters a mistermug.
December 5th national date your fake sister or fake brother for a day no regrets you have to date them no cheating
“It’s December 5 yo why be single” or “it’s national date your fake sister day let’s go”
by Lowkeykeen December 4, 2020
mugGet the National Date your fake sister daymug.
December 5 is the day you should say your fake sister and if y’all like it then y’all should date fake sister or fake brother go for it ! I mean try summ new!!
It’s December 5 date your fake sister day”
by Lowkeykeen December 4, 2020
mugGet the Date your fake sister daymug.
National punch your sister day is every February 20th, where you can punch your sister all day long
by Alyankees12 February 20, 2023
mugGet the national punch your sister daymug.

Your sisters moustache

Your half gay brother in law who is of a different race.
Who is this gay black guy hitting on me? Oh that's just your sisters moustache.
by The lábinator January 9, 2020
mugGet the Your sisters moustachemug.

Kick your sister day

Kick your sister day is on august the second so they should beware of where they go on that one day
Kick your sister day is when you are able to kick the ever living daylights out of your sister
by Gavin Mamalton August 1, 2023
mugGet the Kick your sister daymug.

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