Two ladies who have both ridden the same penis. The feminine form of the term Tunnel Brothers.
' Fuck yeah, I banged Johnny last night!' - Sally
' Mate, so did Mary last week, congratulations, you're Saddle Sisters now!' - Gertrude
'That's etch...' - Sally
by AZAR June 6, 2014
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When you and another person has had sex with the same man.
Me: Hey guess who I took home yesterday? I have a new Saddle sister.I rode that Dick for hours last night.
Friend : please tell me its not my ex ? I don't need you for my saddle sister he add to my family he s been around so much its like we should have reunion.
by Stay slow January 13, 2021
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The female version of Eskimo brothers. Two females who have slept with the same guy.
Me and Jenny both slept with Tim so we are saddle sisters.
by Yoursisterjenny December 30, 2020
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