Common phrase used on Facebook page North Shore Beefs meaning “your sister’s ass” or “ya sistah’s ass”.
Go fuck YSA.
by Adam Humptown April 23, 2023

1: Dave, I'm goin' out saturday and need a wing man, YSA?
2: Yo Steveo, look at that girl that Timbo's with, YSA?
2: Yo Steveo, look at that girl that Timbo's with, YSA?
by The Specialist-age August 11, 2009

loveable, amazing, understanding, reasonable, intelligent, enlightening, lively, young, smart, eager girl
she wishes she was an ysa
by lsm <3 999 January 11, 2012

by uwukins 264 October 6, 2022

by ysassexy.com September 17, 2017

She was such an ysa.
by dejrfiew1243 March 4, 2008
