Poach:
v.
catch (game or fish)
illegally.
intr. (often foll. by on)
trespass or encroach (on another's property, ideas, etc.).
tr. appropriate
illicitly or unfairly (a person, thing, idea, etc.).
tr. Tennis etc. take (a shot) in one's partner's portion of the court.
a tr. trample or cut up (turf) with hoofs.
b intr. (of land) become
sodden by being
trampled.
poacher n.
earlier poche, perh. f. F pocher put in a pocket