Caught with his pants down? = caught redhanded?

[Saneta]

English Language Tests, Intermediate level

ESL/EFL Test #282 "English Slang Idioms (4)", question 9

Unexpectedly, the prosecutors came up with evidence revealing that Matt had forged documents for his company. They caught him with his ......... down.

(a) pants
(b) windows
(c) volume
(d) wits

English Language Tests, Intermediate level

ESL/EFL Test #282 "English Slang Idioms (4)", answer 9

Unexpectedly, the prosecutors came up with evidence revealing that Matt had forged documents for his company. They caught him with his pants down.

Correct answer: (a) pants
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caught with his pants down?= caught redhanded?
thanks

[Linda]

Hi Saneta,
The meaning is: "to be surprised in an embarrassing or guilty way; to be caught off-guard; or if some kind of wrongdoing is discovered."
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