firecracker
/ˈfaɪəˌkrækə(r)/noun
1- chiefly N. Amer. a loud, explosive firework; a banger〈主北美〉爆竹, 鞭炮。
1.1
- figurative an outstanding, exciting, or attractive person or thing〈喻〉杰出（或激动人心、有吸引力）的人（或事物）：
the book was solidly excellent but hardly a literary firecracker.
这本书的确很不错, 可是还称不上是出色的文学作品。