In the style of a demon or demonic being.
"Do you like this costume?"

"It's a bit demonesque don't you think? I thought we were going as unicorns."
by Floatingsock December 15, 2015
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Demon-looking.
bob: dude, her face was so demonesque when she knew that we took her phone!
by Ninimania March 19, 2016
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