When it's not just crazy its HELLA crazy.
"dude work tonight was hellaciously insane!!"
by EmergencyRoomKidd November 21, 2018
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To emphasize the intensity of something. Also can be doubled-up to really intensify an object.
1. Man, that accident left a hellacious scar on your back.

2. That pig at the fair was hellaciously ginormous. (Doubled-up)

3. Dude, that's a hellacious amount of "oregano" you have there.
by *Hawaiian Baby* July 12, 2009
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something so wickedly awesome that you cant think of any other word to say but Hellacious
oh man that is some hellaciously good herb, good thing i gots the mother fuckin hook up in the best damn chronix in the northern H.
by herbacious October 14, 2005
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Can be used in a negative or positive way.
Positive-Outstanding, Totally Slammin'
Negative-Overwhelming, unbearable!
-Damn, The work today was Hellacious

+Damn, That playas booty was hellacious
by Nessa March 21, 2004
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An Adjective used to describe something horribly bad.
Did you see that dude with the mullet walk in? It was so hellacious, I can't believe he even left the house looking like that!
by Terri L. August 18, 2007
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extremely bad, unpleasant, or unbearable
Isnt that one song, "Fighter" by Christina Aguilara so hellacious to your ears?
by The Crack Jackal September 6, 2003
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