Turn that frown upside down is when someone isn't happy and someone else is trying to cheer them up.
Cindy was having a bad day so I told her to turn that frown upside down.
by Yessia Ortiz June 8, 2017
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Always stay positive, nobody likes grumpy people.
Examples for turning a frown upside down:

Person 1: Do you know Joe?

Person 2: Yeaah.. he really needs to turn his frown upside down.
by Dinges October 27, 2013
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