Top Definition
What you call a friend who's a girl. Derived from the term 'broski'. Instead of bro, it's sis. And instead of ski its snow, without the w.
Girl 1*walks up to a girl-friend*: "Hey thanks for the money sisno"
Girl 2: "Don't you mean broski?"
Girl 1: "Do you have a penis?"
Girl 2: "No"
Girl 1: "Okay then"
by Tummycity June 04, 2010
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