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1.
Loldemort is a symbiosis between the world known expression LOL and the world's worst enemy: Voldemort. The outcome is a fierce, awesome and epic expression. Used in extremely funny situations only. The expression loldemort will reach world domination in some years, true story.
"dang, that was sooo loldemort"

Haha, loldemort !

Your brother said, "Damn, that's so stupid". Then I say, "Yeah, that's so LOLDEMORT!"

You are such a Loldemort!
by Siv Mensen/Supernam January 11, 2011
 
2.
When you laugh so hard that you metamorphasise into a creepy old man with a wand (voldamort)
Knock knock
Whos there?
Intereupting cow
Interuptin...
MOOOOO!!!!!

LOLDEMORT!

more at www.thatswhatshesaid.co.nz
by loldemort!! March 04, 2009
 
3.
A mixture of the Acronym 'LOL' and the dark lord's name... Voldemort! Used to express amusement in a geeky Harry Potter way.Expect high usage around the release of Deathly Hallows part 1 and 2, especially when voldy himself dies.
Florence- isn't it funny when you replace the word 'wand' with 'willy' in Harry Potter books? 'I've got an unbeatable willy, come and have a go if you think you're hard enough'

Alice: LOLDEMORT!!!
by FlorencePartridge November 14, 2010
 
4.
a harry potter twist on the infamous 'lol'. can be said online or in person.
LOLDEMORT.
by ggrrss June 16, 2010
 
5.
This can be used as both a noun or as a verb; as a noun, it's a laugh so evil that it casts a spell (and a pretty good one, far as I can tell).

As a verb, it is the act of laughing so hard that some sort of magic flies out from your mouth, nose, fingertips, etc.
"If you don't stop showing me "Man Getting Hit by Football" I might have to give a loldemort!"

He loldemorted so hard he left a charred spot of ashes where the corner grocery store used to be.
by J Money For Three March 12, 2010
 
6.
Originating from the traditional 'lol', Loldemort offers variety. Loldemort is the Dark Lord of loling and strikes entertaining fear and terror into the hearts of the person whom you are loling at.
"Hey Gabbeh!"

"What did Batman say to Robin before they got in the car?"

"I dunno...what?"

"Robin get in the car. Loldemort!"

"Ahahaha Loldemort!!!"
by Lol ITS Twinnies February 04, 2009