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Longman Dictionary of Contemporary English
pick-me-up
noun
EXAMPLES FROM CORPUS
▪ He found the clear air and sparkling waters the perfect pick-me-up.
▪ His winning goal against Oxford United was a perfect pick-me-up.
▪ The five-year-old confined to a London hospital bed has been given a postal pick-me-up with get well cards from school pupils.
▪ The prison that's providing a real pick-me-up.
▪ We have grown accustomed to using tea and coffee as a pick-me-up when we are feeling low.
The Collaborative International Dictionary
Pick-me-up

Pick-me-up \Pick"-me-up`\, n. A stimulant, restorative, or tonic; a bracer. [Colloq.]

Wiktionary
pick-me-up

n. a drink, especially an alcoholic one, taken as a stimulant or sometimes as a hangover cure; a restorative, tonic or bracer

WordNet
pick-me-up
  1. n. anything with restorative powers; "she needed the pickup that coffee always gave her" [syn: pickup]

  2. a tonic or restorative (especially a drink of liquor) [syn: bracer]

Usage examples of "pick-me-up".

Food sources include: watercress, potatoes, sunflower seeds, mint leaves, bananas and citrus fruits - so if you sense a deficiency, drink plenty of orange juice as a quick pick-me-up.