Money and blood don't mix like 2 dicks and no bitch
Find yourself in serious shit

from The Notorious B.I.G. – Ten Crack Commandments Lyrics on Rap Genius

Meaning

Like mixing family and business, mixing two wieners and no birdie isn’t cool by Biggie, because it leads to you finding yourself “in serious shit” both figuratively (it tears your family apart) and literally (i.e. anal sex/“in serious shit”)

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