Definition of high-blowing in US English:

high-blowing

noun

  • With reference to a horse: the action or habit of breathing loudly, especially during physical exertion.

Origin

Mid 19th century; earliest use found in William Youatt (1776–1847), veterinary surgeon. From high + blowing, after high blower.

Pronunciation

high-blowing

/hʌɪˈbləʊɪŋ/