noun
a light touch or stroke
verb
to strike lightly
adverb
in a gentle or light manner
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The plumber needed to tap up the leak in the pipe before it caused any further damage.
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I'll just tap up this message and send it to you real quick.
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Let me tap up my friend to see if he wants to hang out tonight.
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She had to tap up her courage before giving the presentation in front of a large audience.