A short argument, usually about something that is not important. (Cambridge Dictionary)
A piece of cloth or leather covering the ankle and part of the shoe and fastening on the side, worn in the past by men. (Cambridge Dictionary)
A cloth or leather gaiter covering the instep and ankle. (Merriam – Webster)
A spat between people, countries, or organisations is a disagreement between them. (Collins Dictionary)
Spats are specially shaped pieces of cloth or leather which button down one side and which were worn in former times by men over their ankles and part of their shoes. (Collins Dictionary)
A short cloth gaiter covering the instep and ankle. (Oxford Dictionaries)
Examples
MG line Fade Spat Sleeves.

https://www.millgear.com/products/mg-camo-outline-spat-sleeves-1