Green’s Dictionary of Slang

wigga n.

also whigger, white nigga, wigger
[SE white + nigga n., invariably derog. term used by blacks to sneer at those who ape their culture and by whites in a generally racist sense]

1. (orig. US) a white person who adopts a black, spec. hip-hop/rap, lifestyle and is not merely a consumer of the records, but attempts to emulate what is otherwise an autonomous black culture.

[UK]J. Baker Death Minus Zero (1998) 22: A couple of wiggers were trying to break into a Vauxhall Astra.
[UK]Indep. Rev. 30 Sept. 1: The young white men [...] who want to embrace the hip hop nation: wiggaz.
[UK]Observer 25 July 29: A timely reminder to all other ‘white niggaz’ that maybe they know less about being black than they like to think.
[UK]Guardian G2 12 Jan. 3: It is argued that Ali G is not poking fun at black people at all but ‘wiggers’ – whites who want to be, or even think they are, black.
OnLine Dict. of Playground Sl. [Internet] whigger v. An adolescent male of Anglo descent who acts out with African American stereotypes.
Urban Dict. [Internet] phat-ass pants – Puffy pants worn by wiggas.
[US]Simon & Burns ‘Get Some’ Generation Kill ep. 1 [TV script] Spic’s a coon and a fuckin’ wigga.
Slaughterhouse Our House‘’ [lyrics] They call me a wigger like Renee Zell’.

2. (US campus) an African American who identifies with whites.

[US]Eble Campus Sl. Oct.

In compounds

wigga-speak (n.) (also wigger-speak)

the quasi-black patois adopted by such young men.

[UK]Observer 22 Feb. 7: Wigger-speak.