Use 'jolly up' to describe actions that add a positive vibe to a place or event. Colorful banners will jolly up the school cafeteria for the fair.
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Visual Appeal
'Jolly up' often involves visual changes like decorations or lighting to improve appearances. String lights can really jolly up a dull balcony.
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Event Preparation
'Jolly up' is appropriate when preparing or enhancing social gatherings or celebratory events. Let's jolly up the meeting by starting with some fun icebreakers.