Fabricate and promote a nick name for yourself within a group when you haven't done enough to earn it.
Carson: Man, the unbelievable crap I put out my plebe year plus the picture of that catfish bitch Tebowing last year...I hereby declare myself king of the new generation BTeam emailers!
Keiser: No so fast, tool.
Danno: You kinda make me uncomfortable. Just not kool.
Wigg: Don't self-gloss, fool. WTF?
Swany: Shut up, Big Baby.
To give yourself a nickname, or hype yourself to an unnecessary degree.
Richard : Mojo shoots! Mojo scores!!!
Clay : Who the hell is Mojo?
Richard : I am.
Clay : Who gave you that nickname?
Richard : I kinda came up with it myself.
Clay : No one like self-gloss, dude.