I’m a hustler, was cold blooded
All my customers their nose running

from Brother Ali – Need A Knot Lyrics on Rap Genius

Meaning

Ali leads the listener to believe he’s referring to a past as a cold blooded, remorseless hustler, whose customers' noses were running from all the coke they were snorting.

In actuality, though, the cold bloodedness refers to literal temperature, and the running noses refers to sniffles induced by Minnesota winters, which do not play:

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