Distasteful and repellant: hellacious smog. (adjective)
Slang Extraordinary; remarkable: a hellacious catch of fish. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "hellacious" in a sentence
"He takes us back to his youth in "hellacious" Brownsville, Brooklyn of the 1970s, telling us that before he became a street thug, he was the target of neighborhood bullies because he lacked the confidence to stand up for himself."
"Nicole Belle, from who I borrowed the long quote above, asks: "What kind of hellacious Kool-aid are they serving down at the Weekly Standard?""
"Miller was his usual forthright self, saying Tiger Woods was "hellacious" Sunday."