"percussive maintenance : (humorous) The use of physical concussion, such as a knock or a tap, in an..."

“percussive maintenance : (humorous) The use of physical concussion, such as a knock or a tap, in an attempt to make a malfunctioning device or person work.
To celebrate April Fools’ Day, this week we are featuring a series of unusual concepts – enjoy! Today is also the anniversary of the founding of Apple Inc. in 1976, an American company established to develop and sell a product sometimes subject to percussive maintenance – the personal computer.”

- https://en.wiktionary.org/wiki/percussive_maintenance

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