Top definition
the act of becoming chipper, cheerful or lively due to a sudden change of circumstances...

instant mood lifter
to become more high-spirited
I was down all day but when I saw my mom calling my phone, I chippered up and answered it with a smile.

I was so stressed at work, but when I saw my crush walk past, I chippered up and said hello to him with a smile.
by wordsmith killer December 12, 2013
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