OJ typically means ‘On Job’. It is usually used to describe gang members who have a good work rate on road.

A swimmer

We all know he did it.

A little known word meaning a crazy nymphomaniac from scotland

Getting away with something big.

v.t.
1. To violently slash with a knife or other sharp instrument. (In particular, to slash a person's neck from ear to ear with a knife to the extent that they are almost decapitated.)

2. To kill.