Definition of "harum-scarum" [har•um-scar•um]

• Lacking a sense of responsibility; reckless. (adjective)
• With abandon; recklessly. (adverb)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "They may prefer to dive into a thrilling, suspenseful harum-scarum world when they read."
• "Once you get above chapter book level, it seems like almost all new fiction for kids is (or wants to be) thrilling, exciting, harum-scarum, suspenseful, non-stop, etc."
• "Such encounters were relatively common in the harum-scarum chaos of an early solar system that teemed with veering planets and asteroids."