When a small dog is angry and upset about nothing and starts uncontrollably barking/growling/screaming/biting things when things don't go their way. Similar to a Bitch Fit.
!WARNING!
Most common trigger of Groutfits are when people mistake these small dogs (Pomeranians, Chihuahuas, Shitzus, Yorkies) for large rats.
Bobby: Why is your dog barking at the couch?
Meg: Just ignore him, heรขยยs having a groutfit.
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