to punch or hit someone as a result of the person upsetting you

When you eat dirt for the first time and leave your family to build a shack in the woods

To give the first punch. Where the person did not expect it, or where they did expect it but it was to fast for them to react.

to suprise someone with a blow to the face.

to steal the first blow in a fight hence steal off, since normally people "square up" in a fight so you punch them before they square up.

To discreetly sneak away with the hopes of going unnoticed.

steal off means 2 go crazie