Then I went the white girl way like OJ
So you can call on Kato, but I'm sorry OJ

from Mighty Casey – White Girls Lyrics 13 on Rap Genius

Meaning

Star NFL running back OJ Simpson married a white girl — Nicole Brown Simpson! (it ended quite stabbily, of course..)

Kato — OJ’s friend, and a key witness in the murder trial — is used her as a catch-all for “white guy”

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