A phrase you use to tell a person once you see them no word will be spoken, but hands will be thrown

When someone messes with you or someone close to you.
When you wanna fight someone

On sight means that when you have beef with some body you automatically fight them. There is NO talking it out

To inform someone that you WILL engage in a serious physical altercation with them WHENEVER, WHERE EVER & AROUND WHOM EVER upon YOUR eye contact of their PRESENCE without ANY discussion .

Throw hands no words

two or more people, who have a long standing disagreement, agree to physically handle their problem upon seeing each other; whether it be a planned or coincidental meeting you are expected to fight your opponent

When you see someone you dislike or have a problem with and you guys automatically break out into a scrap upon seeing one another.