What is the meaning of Pikey?

A pike (type of fish).

Associated with or filled with pike (fish).

An itinerant person, especially one of Romani or Irish Traveller heritage.

A working-class (often underclass) person with negative qualities stereotypically ascribed to Romani people and Irish Travellers, regardless of ethnicity.

Of or having qualities associated with an itinerant person or ethnic group.

To steal.

↑ Oxford Dictionary of Modern Slang (2010, →ISBN, page 218: "From pike verb, perh. in the earlier sense, to steal."

Source: wiktionary.org