Used in 《水浒全传》 ch. 14: 夺过士兵手里的棍棒,劈头劈脸便打 — 'he snatched the soldier's cudgel and rained blows on his head and face.' Later fixed as 劈头盖脸.
usage
Most often used adverbially with verbs of impact: 骂 (scold), 打 (hit), 砸/下 (rain/pour). It intensifies the verb, signaling 'all at once, without mercy.'