It's a more informal and sometimes forceful way to tell someone to stop talking, especially if they are being annoying or repetitive.
Here's a breakdown of the phrase:
* Holler: This word can mean "shout" or "yell," but in this context, it's closer to "speak" or "talk."
* Nuff: This is a shortened form of "enough."
So, "Holler nuff" essentially means "Stop talking enough" or "You've talked enough."
It's important to note that the phrase can be interpreted differently depending on the tone and context of the conversation. It could be a playful way to stop a friend from rambling, or it could be a more serious request to end an argument.