Unlike rl-peens (i.e. a real life penis), e-peens are 'flexed', brandished, whipped around, (or otherwise used) with unfailing regularity.
Another difference between e-peens and rl-peens are that e-peens can shrink and grow exorbitantly, i.e. more than a regular penis would with an erection.
By saying that all those players are nubs, you are just flexing your e-peen.
v. used to describe the act of showing off or stroking one's own ego, esp. with regard to computer game prowess.
1337s4v10r: U l00zrz just bitch coz u dont no how 2 play ur toons rite!!!11 lern 2 play, fuktards!!one11
casual_gamer: There's always some asshole e-peening on this forum <ignore button>.
The act of gloating, or rubbing a victory in someones face, without actually doing or saying anything. Can also be silent epeening when the person ahead in the competition will not acknowledge the other participant
Two people are playing a fighting game, one just won the game land-slide. He's doing nothing but sitting there not acknowledging the other person talking to him. "Stop your fucking Silent E-peening you faggot"