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1.
A girl with semen on her back
I pulled out while doing her doggystyle, and gave her a spackleback.
by Brian Balzac April 24, 2008
 
2.
When generally, but not always, a man ejaculates on the back of another.
Last night I gave her spackleback after riding her dogie style.
by Greg The Great 1973 October 01, 2010