a retarded spelling of "slore" by people with no English skills. A combination of the words "slut" and "whore". Obviously taking the SL from slut and the ORE from whore, to make one uberword for how dirty a bitch is.
seriously? someone thinks whore is spelled hoar? what kind of slore is THAT stupid? oh yea... that guy who thinks the word is spelled sloar.