
Drum up
Persistent Effort
Implies a dedicated and sometimes creative effort to achieve a goal.

The sales team worked overtime to drum up new clients.
Promotional Context
Often used when someone is promoting a product, service, or event aggressively.

The author visited bookstores to drum up interest for her novel.
Not Instantaneous
Suggests a process that may take time and doesn't result in immediate success.

It can take weeks to drum up enough support for the charity event.
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