An onomatopoeic interjection expressing disgust or contempt (like 'pheh' or 'phooey'); often written as 'ペッ'.
まずい料理を一口食べて、彼は思わず「ペッ」と顔をしかめた。
He took a bite of the bad-tasting dish and instinctively made a 'pheh' face.
約束を破った相手に向かって、彼女は小さく『ペッ』と言った。
She softly said 'pheh' toward the person who broke the promise.
汚れた靴を見て、子どもが『ペッ』と唾を吐くまねをした。
Seeing the dirty shoes, the child mimicked spitting with a 'pheh'.