A political spin attack aimed at discrediting an alternative view, derived from SPin attACK. First noted use Aug 2012 in an exchange of correspondence with conservative constituency office (Tewkesbury UK).
The politicians SPACK upon his rival was misleading and aggressive.
Spack is a Spaz on Crack. A person on crack who happens to be a spaz. Someone who acts like a spaz and also like someone on crack. a form of showing someone your anger or frustration. Also a form of insult.