1 definition by The Girl Who Kicked Thru Iron

SILF

When your sister wants you to fuck her. In most cases, brothers ask their sisters. But that's probably the only thing that sibs can agree on...
sex love sisters brothers ass yummy tits penis dick vagina seducer

Sister: Bro, come here for a sec...

Brother: What?

Sister: (strips off clothing)

And they lived happily ever after..
But she's a guy stealing SILF!

by The Girl Who Kicked Thru Iron August 21, 2010