meat of poultry, pigs, etc., as opposed to red meat, is recorded from 1752; earlier it meant "foods prepared from milk" (early 15c.). Black slang sense of "white women as sex partners" is from 1920s.
A white person, esp a woman, regarded solely as a sex partner
[immediately fr the white meat and dark meat of cooked fowl; meat, ''the vulva,'' is attested fr the late 1500s]