broadsided him in the worst way? meaning?

[Saneta]

English Language Tests, Intermediate level

ESL/EFL Test #282 "English Slang Idioms (4)", question 7

When his wife filed for divorce with no prior warning and sued for half of his assets, he felt that she ......... him in the worst way.

(a) employed
(b) broadsided
(c) breached
(d) erased

English Language Tests, Intermediate level

ESL/EFL Test #282 "English Slang Idioms (4)", answer 7

When his wife filed for divorce with no prior warning and sued for half of his assets, he felt that she broadsided him in the worst way.

Correct answer: (b) broadsided
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broadsided him in the worst way? meaning? thanks

[Mister Micawber]

Broadside: to make concerted verbal attacks on: The President was broadsided by the opposition.
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Native English teacher at Mister Micawber's