flaps
Flaps (noun) means an old veterinary name for a condition causing inflammation and swelling in a horse's mouth, especially the cheeks and lips. Example: “The stable hand noticed the horse had flaps and called the vet to check its gums.”
How to use flaps
Learner’s notesIn plain EnglishAn archaic term for mouth inflammation in horses.
This veterinary sense is obscure and rarely used today — almost every modern use of "flaps" is simply the plural of "flap" (loose hanging pieces, like on an aircraft wing or an envelope).
Fill the gap
Can you complete this real example?
The stable hand noticed the horse had _____ and called the vet to check its gums.