Sentence:  But if there's one thing he hates more than <WSD>pikeys</WSD>, it's posh people. 
Meaning of the word marked with <WSD> tags:  A working-class (often underclass) person; can vary from specifically Irish Travellers to gypsies or travellers from any ethnic background, but now increasingly used for any socially undesirable person, with negative connotations of benefit fraud, theft, single-parent families and living on run-down estates.