shake up
To make big changes to something, or to upset someone so much that they feel rattled.
Meanings
To make significant changes to an organisation, system, or established way of doing things.
"The new CEO wasted no time in shaking up the management team."
To disturb, upset, or shock someone emotionally.
"The news of the accident really shook him up — he couldn't concentrate for the rest of the day."
To mix something by shaking the container vigorously.
"Shake up the bottle well before opening — the juice settles at the bottom."
Very widely used in news reporting about corporate restructuring, politics, and sport. The noun 'shake-up' is extremely common in headlines. Also used for the physical act of shaking a liquid container and for the emotional sense of disturbing someone.
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