Half a minute, second, etc.
Definition 1 of 3

Implied Impatience
Reflects speaker's impatience or the listener's urgency to act within a brief time frame.

Give me half a minute to wrap this up!
Exaggeration Possible
May be used hyperbolically to mean an undetermined brief wait, not always exactly 30 seconds.

Hang on for half a minute while I check.
Cultural Perception
The perception of 'half a minute' can vary in different cultures; some may see it as immediate.

I’ll be with you in half a minute!
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