Talk: Horse
From A Wiki of Ice and Fire
stot
A stot is not an acrobatic horse. It is a waste of hooves - one step this side of the glue factory. From wiktionary:
Etymology 1
From Old English stot, stotte (“a hack, jade, or worthless horse”), in turn from Old Norse stútr.
stot (plural stots)
(obsolete) An inferior horse.
Ref: OED, etc...