bumping
n.— «This security consultant is about to demonstrate how easy it is to pop open a P.O. Box with nothing more than a tapping device and a blank key.…It’s a method called “bumping” and he says anyone can do it. He wouldn’t let us video tape him bumping a lock at U-S Post Office Box, but said he achieved the same success.…Tobias says bumping keys are sold commercially and on the internet.» —“Bumping P.O. Boxes” by Don Jorgensen KELO-TV (Sioux Falls, S.D.) Apr. 4, 2006. (source: Double-Tongued Dictionary)