Top Definition
Of or relating to the metal band Opeth. Usually describing something very gloomy, creepy, and haunting. often in black and white.
This photography sure is Opethian!
#opeth #metal #scandinavian death metal #melodic death metal #blackwater park
by Sam Owen October 19, 2008
An advanced form of artificial intelligence, strategically engineered for world domination.
17:49 <*****> Opethian who are you?
17:49 <Opethian> it's not funny, it's just a bunch of colorful and furry round fucks that hop around and playing with my alcoholism. Ignore it.

you've all been warned
#bot #eggdrop #script #world domination #opie
by brutal death March 30, 2006
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