It is a term often misused by many in LoL, confusing it with
top diff. It's true meaning is when your
jungler out-jungles the enemy jungler, like
tyler1, the inventor of the word and the best jungler in the world.
Me: Did you know
Nightblue3 is the worst
jungler in human history?
Friend: That's because he can't jg diff like tyler1, the best jungler in the world.
Nightblue's Fanboys: ThAt Is NoT TrUe *cry in sorrows