(derogatory, slang) Overly talkative, insolent, and loud.
Of a dog: inclined to bite or nip.
The separation and isolation will send a clear message to your overly mouthy dog. After a couple of minutes, you can try again. It may take a few repetitions before your dog connects the nipping behavior with losing you, […] 2011, Tamar Geller, 30 Days to a Well-Mannered Dog: The Loved Dog Method, page 94:
An excellent way to redirect a “mouthy” dog's teeth to an appropriate object. Great exercise and the perfect outlet for family members who want to play roughly. 2008, Pat Miller, Play with Your Dog:
Etymology tree
Proto-Indo-European *men-
Proto-Indo-European *-tós
Proto-Indo-European *mn̥-tó-s
Proto-Germanic *munþaz
Proto-West Germanic *munþ
Old English mūþ
Middle English mouth
English mouth
Proto-Germanic *-j-, *-ij-
Proto-West Germanic *-i, *-ī
Old English -iġ
Middle English -y
English -y
English mouthy
From mouth + -y (diminutive suffix).
Meanings
(alt-of, alternative) Alternative spelling of mouthie (“the mouth”).
Poor diddums! Do the edges hurt your little mouthy? 2022 November 15, Bruce, “Re: How many ways can you order your eggs?”, in rec.food.cooking (Usenet), archived from the original on 02 Dec 2025:
“Come here, my little sweetie pie,” Mother said after Dad had done all he could. “Let Mommy wipe your little mouthy-wouffy.” She cooed and gagged at the same time while wiping the rat’s mouth off with a wet wipe as if it were a toddler. 2006, Denise Hildreth, chapter 7, in Savannah by the Sea, Nashville, Tenn.: Thomas Nelson, →ISBN, page 44:
Well, whether Jack wrote a book or not SEEMED to be your point when you chose to use the word 'CLAIMED' when referencing his works. Now, rather than admit you put your foot in your mouthy, you CLAIM to not care. How nice it must be to ignore evidence, which invalidates your assertions. 2007 June 19, Spydertrader, “Volume-Price Chart”, in misc.invest.stocks (Usenet), archived from the original on 02 Dec 2025:
Alison says ‘Open your little mouthy and I’ll give you a pill’. I open my mouth like a baby bird and say ‘Tweet tweet tweet[’]. Incidentally, we are quite ruthless people in other respects, but behind closed doors… 1997, Gary G. Graham, “Tweet Tweet Tweet in Birdland”, in The Cannabis Octet, Glasgow: Crushed Anna Books, published 2001, →ISBN, “Cannabis-2: Psycho John and Shotgun Jack” section, page 63: