A fork of Rural Dictionary
Sister or Sister in-law I'd like to fuck
Hey Brandt, your Sisterin-law is a SILF!
A sister you would like to have sexual intercourse with. Usually goes by the name Danielle or something close to that. Usually has one brother.
Stuart- Woah! his sister is such a silf by the way!!!
"Son I'd like to fuck". milf dilf
Did you see the SILF wearing the letter jacket with his mom and dad at the restaurant?