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1.
The back of a woman's knee.
Check out those mother fuckin scony macks!

Damn that scony mack looks tight!

Sorry dude I didn't hear you. I was entranced by that scony mack.
by hooker in barney outfit April 06, 2011
 
2.
the technical term for the fourth orifice that women have on the back of their knees.
i totally went bazonkers all over her scony mack last night!

man, that bitch's scony mack is tight!
by mr. family friendly April 01, 2011