setfast

A tumour on a horse's back.

Noun

  1. A tumour on a horse's back.
    • Her brother Clint had bought a horse and saddle off that pastor and there had been a setfast under the blanket nearly the size of a griddle cake. - 2013, Philipp Meyer, The Son, Simon & Schuster, published 2014, page 8:

Origin

From set + fast.

Forms

setfasts