The nickname, adopted by the bronies, is a portmanteau of a word troll and Celestia. The name is attributed for her particular actions and behaviors, which is interpreted by most bronies (citation needed) as trolling.
I personally think that the whole "Trollestia" thing is an elaborate ruse started by her younger sibling, Princess Luna as a form of revenge for trapping her in the moon for 1000 years, but...yea...
When one trolls to much,The begin to get Trollervites.Some symptomes of Trollervites is crampingfingers,lose of vision/color
Me:Hi
Troll:R u getting high?Thats fucking illegal
Me:Um,no.I just said hi.Im to old to do drugs..
Troll:If you too old to do drugs,then why are you talking with me you damn pedophile.
Me:Dude,you must be getting Trollevites.
Often used in either conjuction with the word solemnity (they rhyme) or used as a joking expression to express your disdain at the overly seriousness of a situation.
Please note that all who use this are Geordies and should be regarded wiht ultimate disdain- they're a bunch of losers.