sister act 

The act of two or more sisters engaging in sexual intercourse with one or more men, usually in a threesome or an orgy.

Ah, if only Brigid had a twin, we would totally get a sister act going in my bedroom.

sister act by Robert Crumballs May 14, 2005

sister act 

a feeling of total annoyance of the ingnorant ghetto wannabes around you

I feel totally sister act, those bageenies won't shut up.

sister act by Anonymous March 17, 2003

Sister Act 

Changing a religious hymn/carol's lyrics and beat to make it groovier, as seen in the movie "The Sister Act"

"Pentatonix really pulled a Sister Act on us"

Sister Act by AlbyChu May 21, 2023

Sisterection 

Becoming aroused from contact, verbal or physical, from one's female sibling.

I couldn't concentrate on my maths homework, as I had a sisterection from the family gathering.

Sisterection by Moses "Sandals" Jackson November 13, 2010

sisterectomy 

The act of removing a sister from your life, either physically or metaphorically. First used in the Simpsons episode "My Sister, My Sitter".

Simpson? Look, we've already been down there tonight for a sisterectomy, a case of severe butt rot, and a leprechaun fight. How dumb do you think we are?

sisterectomy by ubersmith May 17, 2016

Sisterationship

When 2 girls have a totally platonic love for each other. A bit like a bromance.

Alice: Oh, I totally love you girl!

Kerry: Yeah, same here!

Alice: We're totally in a sisterationship.

Kerry: For life!

Sisterationship by ALICEHARRIS July 9, 2011

Sisterectomy 

The act of removing the bitch from your life cause the only time you hear from her is when she wants something!

I really need to get a "Sisterectomy" so I can have a real life!

Sisterectomy by LibertyCreekDrunkChick October 11, 2018