ˈdɛvɪlmənt ˈdɛv.əl.ɹi ˈdɛv.əl.tɹi ˈmɪstʃɪf ʃəˈnænɪɡən reckless or malicious behavior that causes discomfort or annoyance in others the quality of being a slippery rascal the trait of indulging in disreputable pranks