Meaning of "drum out"

[Malkin]

English Grammar Tests, Elementary Level

ESL/EFL Test #84 "ESL Prepositions", question 10

The director was drummed ......... of office for life when it was discovered that she had been involved in insider trading.

(a) up
(b) in
(c) on
(d) out

English Grammar Tests, Elementary Level

ESL/EFL Test #84 "ESL Prepositions", answer 10

The director was drummed out of office for life when it was discovered that she had been involved in insider trading.

Correct answer: (d) out

Your answer was: ?
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hi,

what doese that mean?

Malkin

[Mister Micawber]

.
drum out:

a. (formerly) to expel or dismiss from a military service in disgrace to the beat of a drum.
b. to dismiss in disgrace: He was drummed out of the university for his gambling activities.

(Dictionary.com)
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Native English teacher at Mister Micawber's