the mind > emotion > fear > nervousness or uneasiness > [adjective] > uneasy > rattled (4)
U.S. dialect. Confused, ashamed, agitated; uneasy, scared, alarmed. Usually to feelor look streaked.
U.S. ? = streaked, adj. 2.
slang. U.S. = streaked, adj. 2.
Originally U.S. Flustered, agitated; disconcerted; alarmed. Also in rattled-sounding adj. Cf. rattle, v.1 8.