A black man who dates and has sexual encounters only with white women, primarily UK slang, attributed to mainly black athletes who are known to
date the hottest
white UK glamour models, actresses, singers, reality
tv stars, etc. Usually, the blacker is also known to be well-endowed and sought out by these women as desirable sexually, but also financially due to their wealth. Blacker is a noun, not a verb or adjective.
He is a
total blacker, never dates black women, never
even looks at them. His
white girlfriends are his trophies.