The Collaborative International Dictionary of English v.0.48:
Poteen \Po*teen"\, Potheen \Po*theen"\, n. [Ir. poitin a small pot, whisky made in private stills; cf. pota pot, fr. E. pot.] Whisky; especially whisky distilled in a small way privately or illicitly by the Irish peasantry. [Written also potteen.] [Webster 1913 Suppl.]The Collaborative International Dictionary of English v.0.48:
Potheen \Po*theen"\, n. See Poteen. [1913 Webster]