1. Cheerfully irresponsible
   "had a harum-scarum youth";
   - carefree, devil-may-care, freewheeling, happy-go-lucky, slaphappy [informal]

1. A reckless impetuous irresponsible person
   "The harum-scarum driver weaved dangerously through traffic";
   - daredevil, madcap, hothead, swashbuckler, lunatic

1. In a wild or reckless manner
   "dashing harum-scarum all over the place";
   - pell-mell

Derived forms: harum-scarums

See also: irresponsible

Type of: adventurer, venturer