Green’s Dictionary of Slang

(Irish) a dishonest, dubious person; also a sexually active individual.

1978		T. Hallisey Cork Holly Bough n.p.: ‘You caffler, you scut, you trickie, you tally-boy,’ he roared [BS].
2004		J. Beecher ‘Dict. Cork Sl.’ www.corkslang.com 🌐 Tarry-boy A male of questionable behaviour (amorous person) [...] Derivation: Unknown, but note Irish ‘Tarbh’ and Latin ‘Taurus’ – a bull.
2004		‘Some Corkonian Sl.’ at lioncityhash.com 🌐 Listen you stop acting The Tarry boy with my bure or I’ll claim ya.