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Someone who causes maximum disruption and destruction with their lolz
Person A: I totally destroyed Gareth's confidence and self-esteem by lol'ing without mercy at his stupid new haircut

Person B: Damn, you loltergeist! (lols)
by HoJoJojo July 17, 2012
Someone who spreads lol material around like AIDS.
When Shawn showed us the YTMND he made, he became a loltergeist at school.

Danny is the local loltergeist.
by AWPerative August 14, 2006