The Collaborative International Dictionary of English v.0.48:

Sorehon \Sore"hon\, n. [Corrupted from sojourn, Scot. soirne,
   sorn.]
   Formerly, in Ireland, a kind of servile tenure which
   subjected the tenant to maintain his chieftain gratuitously
   whenever he wished to indulge in a revel. --Spenser.
   [1913 Webster]