freewheeling
1. [ adjective ] free of restraints or rules
Examples:

"freewheeling foolishness" "the versatility of his poetic freewheeling style"

Related terms: unrestrained
2. [ adjective ] cheerfully irresponsible
Synonyms: devil-may-care happy-go-lucky harum-scarum slaphappy carefree
Examples:

"carefree with his money" "freewheeling urban youths" "had a harum-scarum youth"

Related terms: irresponsible