Cause they gon' want they money rain sleet hail snow
Your creditors will demand their money regardless of circumstances — so if you are unable to meet your financial obligations they will probably rob and injure/murder you.
This is also a reference to the U.S. Post Office unofficial motto (lifted from the ancient Persian royal couriers): “Neither snow nor rain nor heat nor gloom of night stays these couriers from the swift completion of their appointed rounds”
To help improve the meaning of these lyrics, visit "Ten Crack Commandments" by The Notorious B.I.G. Lyrics and leave a comment on the lyrics box