dy·na·mo 
/ˈdaɪnəˌmoʊ/ noun
plural dy·na·mos /ˈdaɪnəˌmoʊ/ noun [count] 1 : a machine that produces electricity : generator 2 informal : someone who has a lot of energy
▪ He's a dynamo on-screen. ▪ a human dynamo
▪ He's a dynamo on-screen. ▪ a human dynamo
