Wet a whistle

Meaning

To have a drink, usually referring to an alcoholic beverage or a cold soda. It implies refreshment, especially after a long day of work.

Folksy, casual

Used in a sentence

• Let us head down to the pub to wet a whistle.
• I could really use a cold lemonade to wet a whistle right about now.
• After mowing the lawn in this heat, I need to wet a whistle.