Birthday Sister

A female who shares the same birthday as you. You were born on the same day of the same year. You are not true siblings, but you share a significant bond
See Also Birthday Brother

Anna: Happy Birthday Robyn.
Robyn: Happy Birthday to you too, Birthday Sister

by Pablo2342 May 31, 2010

Sister Patterson

New York`s mother. She hates Flavor Flav and Chance and will take away anything thug-like from her daughter. See devil.

Sister Patterson looks like the devil in her red suit and when she laughs like a hyena.

by iHateEmos July 9, 2007

sister-friend

Your bestesting friend. Better than any friend. Who's been your friend for so long you might as well be sisters. You hate her you love her. She's your sister.

I have to make my sister-friend my maid of honor at my wedding or she'll kill me!

by Dancingmelissa September 6, 2005

Sister Boy

A feminine, homo-type of a male. Used several times in the movie "Tombstone"

Curly Bill, Ringo and their Cowboy
entourage form a block in the center
Rows while BILLY BREKENRIDGE, Behan's bespectacled, slightly
effeminate little Deputy makes his timid way down the aisle,
looking for a seat midst the off fist-fight and yelling match.
2 cocky young Cowboys, BILLY GROUNDS and ZWING HUNT, call out
to him:

HUNT: "Hey, Sister Boy!"

by Matthew Boyd September 1, 2005

Stomach Sisters

(Originally an Icelantic term) used for multiple girls who slept with the same person

Girl #1 “Look at this boy that I did it with last night, isn’t he cute?”
Girl #2 “Oh my God, I slept with him too! That means we’re stomach sisters!”
Girl #1 “What does that mean!”
Girl #2 “That means that we’ve slept with the same person!”

by Heyitsj000 April 18, 2019

incest is the best put your sister to the test

:) :) :) :) :) pie

:) :) :) :) :) bananas

by cheeseguy May 24, 2004

sisterfister

Strictly, one who indulges in a particular form of incest, using only their hand (see fister. Often used as a term of contempt, and shortened to "sissy" on account of their unadventurousness.

See also brotherfucker.

Your brother's such a sisterfister, you know.

by Lucifer B September 20, 2005