irresponsible (adj.)
- adrift
- afloat
- alternating
- amorphous
- capricious
- carefree
- careless
- changeable
- changeful
- chartered
- desultory
- devil-may-care
- disobedient
- dizzy
- eccentric
- erratic
- excused
- exempt
- favored
- feckless
- fickle
- fitful
- flickering
- flighty
- fluctuating
- fly-by-night
- freakish
- giddy
- headstrong
- heady
- immune
- impetuous
- impulsive
- incautious
- inconsistent
- inconstant
- indecisive
- ineffectual
- infirm
- insubordinate
- irregular
- irresolute
- lawless
- licensed
- licentious
- mazy
- mercurial
- moody
- mutinous
- privileged
- rambling
- rampant
- rash
- reckless
- released
- restless
- roving
- scatterbrained
- self-willed
- shapeless
- shifting
- shifty
- spasmodic
- spineless
- unaccountable
- unanswerable
- unbridled
- uncertain
- unchecked
- uncontrolled
- uncurbed
- undependable
- undisciplined
- unfixed
- ungoverned
- unpredictable
- unreliable
- unrestrained
- unruly
- unsettled
- unstable
- unsteady
- unsure
- untrustworthy
- untrusty
- vacillating
- vagrant
- variable
- volatile
- wandering
- wanton
- wavering
- wavy
- wayward
- weak
- whimsical
- wild
- wildcat
- willful
- wishy-washy
