Blistered Sister 

A nun with a prominent and questionable cold sore.

Father Mulveaney couldn't help but notice the blistered sister sitting in the front row at mass. He made an appointment with his family doctor after service just to be safe.

Blistered Sister by Eaton Holgoode November 28, 2015

Line Sister 

a girl who pledges a sorority with you. she is generally very close to you and has your back.

Person: Who's that in the picture with you?
Me: That's my line sister! We're inseparable! Love her so much!

Line Sister by spr12 July 25, 2012

Ben's sister 

The most attractive girl you will ever meet. Probably much younger than you but still a 10/10

I'd bang Ben's sister even if she is only 18

Ben's sister by Mr Mollestor December 14, 2018

kissing my sister 

An expression indicating that something is unsatisfactory, though not entirely terrible.

Wil: Winning back the $50 that it cost to enter the poker tournament after playing for 12 hours is like kissing my sister!
Ty: You've kissed your sister?!?!
Wil: Don't tell anyone...

kissing my sister by Dan TheMan October 9, 2007

dear sister 

A joke that stemmed from an episode of The OC and Saturday Night lLive that revolves around the shooting death of a character in slow motion, with a memorable excerpt from the song "Hide and Seek" by Imogen Heap used as audio. Was amusing at first, but now the subject of done-to-death spoofs on Youtube using clips from various films.

Imogen Heap refrain: (Gunshot) Mmmmm whatcha sayyyyy. Mmmm that you only meant well...
-refrain used in "Dear Sister"

dear sister by HueyFreeman October 1, 2007

little sister

worse than satan

random person: omg your little sister is so cute!
me: are you kidding?! she's a fucking horrible goat!

little sister by a genderfluid person May 11, 2020

MY sister 

A obnoxious piece of shit who loves screaming her head off and stealing your mans

MY sister just stole my boyfriend

MY sister by phlaty patty May 11, 2019