when a young man lets a bit of power or position go to his head and acts a nasty, little egomaniac / from "Game of Thrones" character, King Joffrey Lannister
The dog-pound dude was showing us serious Joffreyism, so we had to lock him in a cage.
"Jeffervescence" is the quality that someone named Jeff possesses when he is overflowing with enthusiasm, sparkling with charisma, beaming with light, exuding joy. The term was coined by Suzanne Whang (former host of HGTV's #1 show, "House Hunters") and was inspired by watching Jeff Vezain perform on stage with Gary Sinise's Lt. Dan Band.
As soon as he made his entrance on stage, grabbed the microphone and started singing, the audience was delighted and transfixed by his Jeffervescence.