1.(archaic): to damage or destroy objects (usually motor vehicles), especially those made of sheet metal or other thin materials;
2.: damage something or injure someone in an intense, prolonged and/or emotional fashion.

Comes from panel beater (Commonwealth) - a person responsible for fixing damaged metal bodywork (panels) of an automobile, usually by striking it in some way (beating).
Paulie: You think it's for you? This life?
...
Thomas Angelo: I doubt that every day you and Sam go and panel-beat motors in parking lots.
P: Eh. There's busy days, there's slow days.
by Comrade Vinny October 21, 2020
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definition of being Panel beated is that someone beats you like you would beat panels to fix car's dent/crash
usually referring to that you are getting beaten to the death like you would beat up an inanimate object.
Commonly used in IT environment where your manager punishes you when caught a staff fooling around.
Originated From Mike O, B founder of the Panel Beating via "HAND" often don't use tools to get his job Done.
I would not do that if i was you, he will Panel Beat you.

I got Panel Beated yesterday for not doing well at my Job.

My manager went to a course of how to Panel Beat the employee to get maximum efficiency.
by neoPSYCHO December 17, 2019
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