cycle sister

When you’re so close to your girls that your periods sync up. You become cycle sisters.

Bae we both need a tampon because we’re cycle sisters. Love you bae.

by S Cal January 18, 2019

Surprise Sisters

When two friends randomly text each other or shout “Surprise” at any moment.

“Hey Morgan, guess what?”
“What is it?”
“SURPRISE!”
“Yassss Surprise Sisters!”

by All The Tea Sis January 27, 2019

sister scandalous

A friend that is being more scandalous than usual

Paige’s nudes were sister scandalous

by Itsreallymeboi September 22, 2018

eskimight sisters

A variation on eskimo sisters, referring to two women who ALMOST had independent relationships with the same person.

Wait, you almost slept with Jared? That almost happened to me! We're eskimight sisters!

by djrockinron_95 May 30, 2018

Sassy Sister

That one friend that is sassy and annoying but is also the best!

Bsf 1 - She's soooo sassy
Bsf 2 - yeah cause she's a SASSY SISTER?!?!

by duuuuuuuuudeee November 7, 2019

sister-in-law

1. The wife of one's brother.
2. The sister of one's spouse.

My sister-in-law is a good person.

by Elivaldeq November 24, 2019

Sister Hopping

the act of flirting, expressing interest, having sex with, or dating one sister and then expressing interest, flirting, having sex with OR dating the other. Levels of interest don’t have to be the same for both sisters for it to be considered sister hopping. It is an extremely odd practice and one that neither of the sisters involved typically find flattering in the slightest.

Sister 1: oh my god, Alexander totally asked me on a date last night
Sister 2: oh no he didn’t! He has been flirting with me all WEEK!

Sister: oh my god! He’s sister hopping! GROSS!

by prettymami011 December 4, 2019