1) the state of acting like or being pro basketball player Lebron James. 2)used to describe when someone is making a tough decision and broadcasts it to everyone only to gain attention.
1. I just dunked on this guy today at the park. It was total Lebronism
2. Person 1:He can't decide who he wants to go to the dance with so he's going to ask everyone who should go with and pick the opposite person of what most people think.
Person 2:Dude thats such Lebronism.