What? There is nothing racist about the term, nagger. So quit accusing me.
Definitions of nagger
noun
"someone who annoys people by constantly finding fault."
A sand-nagger is an "annoying person that's constantly finding fault" from the middle east.
So, Dawg, did you hear about the dead sandnagger they found down in Mississippi with 8 bullet holes in his head? The authorities ruled it the worst case of suicide in Mississippi history.