Obnoxious fellows who may get physical (5)

I believe the answer is:

jerks

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'obnoxious fellows' is the definition.
The definition and answer can be both people as well as being plural nouns.
Maybe they are linked in a way I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for jerks that I've seen before include "Jolts" , "stupid people" , "Yanks'" , "Exercises; fools (slang)" .)

I've seen this clue in the Evening Standard.

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