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1.
The act of preforming sexual mutual dealings with more than one partner
Lee: Hey hows it going fellas

Alex: fancy a threesome?

Lee: sketastic!
by Davidthedog February 26, 2009
 
2.
Adj. - A state of being so awesome that it makes you wanna SkEt (skeet).
"That chic's ass is SkEtastic."
by Macadocious April 25, 2006