Simple past tense and past participle of perk.(verb)
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Use "perked" in a sentence
"James didn’t look too thrilled to see him enter, but his expression perked up when Remy and I followed."
"After the keynote speech, anyone with half a brain perked up and took notice."
"Rachel and a friend of hers were standing at the end of the parking lot, and hearing them yell my name perked me up enough to make it to the track itself."