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Related to hissy: hissy fits
adj. his·si·er, his·si·est
Characterized by or making a hissing sound: badly recorded music that sounded hissy when played back.
n. pl. his·sies Chiefly Southern and South Midland US
[Short for hissy fit.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
adj, -sier or -siest
having or resembling the sound of a hiss
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
n., pl. -sies.
Slang. a fit of anger; temper tantrum. Also called his′sy fit`.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.