An idiot, loser, retard, or moron. Most often associated with younger siblings, dog owners, and 99.9% of all bloggers.
Damnit, why'd you drop that? You're such a fucking spacker!
by Lessien October 8, 2004
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a nice way of saying "you fucking retard!!"

(can be shortened to spack)
simon walks into a glass door that he thought was open, peter says "my god, you spack/spacker!"
by daisy may March 25, 2005
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So wasted on alcohol or drugs that you are functioning at the level of that of a spacker
My god you were so fucking spackered last night.
by markymoo72 March 22, 2007
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Someone who repeatedly acts like a dick because they think that they are being funny
Alan: ha gay ha gay ha gay
Ben: stop being a spacker alan
by spacker110 January 26, 2015
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"Don't put jam near that shepherd ye spacker."
by felchmeister General October 23, 2003
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