[rat-l-breyn] /ˈræt lˌbreɪn/
a giddy, empty-headed, talkative person.
A silly or stupid person; scatterbrain: Mother would like to travel around but not with an old rattlebrain like you driving (first form 1709+, second 1641+)
/ˈrætəlˌbɒks/ noun 1. any of various tropical and subtropical leguminous plants that have inflated pods within which the seeds rattle
[rat-l-breynd] /ˈræt lˌbreɪnd/ adjective 1. foolish; flighty; scatterbrained.
[rat-l-boo sh] /ˈræt lˌbʊʃ/ noun 1. .
- Rattle cages
verb phrase To cause excitement; shake things up: ”You like to rattle cages,” the saleswoman observed, explaining that it was a California expression (1980s+)