Top Definition
Of or pertaining to something extremely awesome and/or fantastic to the highest degree.
Wow! That party was Slamtastic!!
by Slam Not C July 12, 2009
Hittin', Bangin', Fly, Dope, etc.
Aw yeah!! That new Kool Keith CD is Slamtastic, yo!
by Jeff December 07, 2003
Describing something that inspires a great desire to bone or slam.
Jesus, that ass is slamtastic!
by Weird Caress May 11, 2008
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