Furious with something you've stubbed your toe on? (7,3)

I believe the answer is:

hopping mad

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'furious' is the definition.
(I've seen this before)

I don't understand how the rest of the clue works.

(Other definitions for hopping mad that I've seen before include "In a terrible rage" , "Wild" , "in high dudgeon" , "Extremely angry (colloq.)" , "Furious (as a frog?)" .)

I've seen this clue in the Evening Standard.

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