mug trainer
n.— «From the stable of newcomers Russell and Robyn Rogers who own the Rodmor Stud in Waikato and call themselves “mug trainers,” Veloz did not race at 2 or 3.» —“Racing: NSW hoop scores at Ellerslie” New Zealand Herald (Auckland) Sept. 30, 2007. (source: Double-Tongued Dictionary)
Further reading
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