noun

• (UK dialectal) A land-tax paid in the Shetland Islands.

noun

• (biology) Animal excrement; droppings, dung.
  "They turned to polar bear feces, or scat, as it is commonly called. […] She and Quinoa [a dog] worked with Dr. Rockwell to collect and study samples of polar bear scat for several years and found that the bears were eating lots of geese."
• (slang) Heroin.
• (slang, obsolete) Whiskey.
• (slang, pornography) Coprophilia, scatophilia.
  "Enema queens, like scat queens, are really the scum of the earth."

noun

• (uncommon) A blow; a hit, an impact.
  "... a shot rang out, followed immediately by the "scat" of a bullet against the rock behind which he lay concealed. A tramp of heavy Galloway brogans was heard, and a half-hearted kicking about among the heather bushes, and at last[…]"
• (UK, dialect) A brisk shower of rain, driven by the wind.
  "Low black Clouds on it being ſoppoſed to prognoſticate Rain in the Places beneath it, it has been a ſtanding old Saw, When Haldon hath a Hat, Kenton beware a Skat."

noun

• (music, jazz) Scat singing.