o·ver·step / ˌōvərˈstep/ • v. (-stepped, -step·ping) pass beyond (a limit): you must not overstep your borrowing limit. ∎  violate (a rule or standard of behavior): he has overstepped the bounds of acceptable discipline.PHRASES: overstep the mark behave in an unacceptable way.

overstep
1. An unconformable relationship in which a younger series of rocks rests upon progressively older rocks, suggesting the series below the unconformity is tilted. See also OFFLAP; and OVERLAP.

2. The progressive development of hanging-wall thrusts.