From Wiktionary, the free dictionary
From stud + master.
studmaster (plural studmasters)
- Someone who raises studs (horses).
2009 January 29, Adam Hamilton, “Todd Matthews survives broken back to become driver”, in Herald Sun[1]:Enter his uncle, Shepparton studmaster and harness trainer Steve O'Donoghue, who offered him a job helping feed the stock at his farm.