poaching

–noun

1.the illegal practice of trespassing on another's property to hunt or steal game without the landowner's permission.

2.any encroachment on another's property, rights, ideas, or the like.
Use poaching in a Sentence

-verb

to take without permission and use as one's own: to poach ideas; a staff poached from other companies.

Informal . to cheat in a game or contest.