The Collaborative International Dictionary
Damage feasant
Damage feasant \Dam"age fea`sant\ [OF. damage + F. faisant
doing, p. pr. See Feasible.] (Law)
Doing injury; trespassing, as cattle.
--Blackstone.
Wiktionary
damage feasant
n. (context legal English) The doing of damage; in particular, the doing by animals such as cattle of damage by trespassing.