This is used to refer to the rare kind of "bro" that is able to pick up on some low brow obscure reference that you occasionally cleverly come up with.
The perfect comeback and or repartee for a very bitter remark that may leave personal scars. May be used in a sarcastic and or subtle-dirty joke manner.
Friend 1: Did you hear, Jenny loves going down on men?
Friend 2: Yo, low blow bro!
There is a black man and he is having sexual intercourse's with another male. Then he tries to cover up the truth about him being gay, and no one will find out.That is what a down-low brotha means
Something tasteless or intellectually inferior that is devoid of any intelligence - usually in pop culture. Lacking in refinement and good taste. Often but not always appealing to the absolute lowest common denominator.
"Sorry, Charlie - the second the silly sound effects and music with the low-brow humor start, I'm out the door. No primetime TV for me!"