The Collaborative International Dictionary of English v.0.48:
Rattle-pated \Rat"tle-pat`ed\, a. Rattle-headed. "A noisy, rattle-pated fellow." --W. Irving. [1913 Webster]WordNet (r) 3.0 (2006):
rattlepated adj 1: lacking sense or discretion; "his rattlebrained crackpot ideas"; "how rattlepated I am! I've forgotten what I came for"- Glenway Westcott [syn: rattlebrained, rattlepated, scatterbrained, scatty]