Slam Sisters

Two or more girls that have had sex with the same guy. It is the female equivalent of Box Brothers.
Keith: Both Alison and Stacy had sex with Doug!
Kyle: Haha, they're slam sisters now!
by Kracko January 17, 2011
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sister slam hands (ssh)

To knock a bitch out ;)
Meghan: I'm about to sister slam hands (SSH) with Samantha tomorrow.
Tohmas: OMG. REALLY? Why!!
by ┌П┐(▀̿Ĺ̯▀̿ ̿) November 25, 2018
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