An extreme reaction to irritating workplace noises, such as errant ringing cellphones, crinkling packing tape, or construction noise. Steam usually comes out of ones ears when in this state.
Sarah was afraid to open the package that had just arrived, in fear that her focused coworker might just pull an oliver.
Asked to and then playing the scapegoat for someone elses problem or mistake. (Sometimes without reguard to to the consequences). This is not to be taken likely as the ramifications could be dire or legally destructive to your life.
This is a tough, normally noble thing.
For further reference please see oliver north and the iran-contra affair