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1.
The area on the backside of your leg which is directly behind your kneecap.
Wow, your xentara is huge. Do you work out or something?

I fell down on my xentara today when I slipped walking down the stairs.
by Hoshino September 17, 2008
 
2.
the area on the back of a person's leg behind the knee
Dude don't touch my xentara, its really sensitive!
by zeus the caboose September 17, 2008