An excessive amount of yelling or loud-talking, which is usually the result of (or resulting in) a fight, stabbing, killing, or some other physical altercation.

A casual invitation / threat used by an individual that is not afraid of fucking someone up.

To address more than just a "Holler, hey how are you?" also can be used as another way to grab the attention of a mass audience. Instead of saying, "Hey everyone!" use it as a massive holler... Kind of how States are considered a "nation" whenever its being addressed... "Holleration" can be considered as a wide spread.... Holler.

is another term for hollering at someone; asking them out.

From 'holler'
~Meaning to agree with someone, similar to 'word'.
~Exclamation, comment made to congradulate oneself.

the act of hollering with the mental support of fellow friends and humans behind you.