1. Irresponsible in the use of firearms 
2. Marked by extreme intensity of emotions or convictions; inclined to react violently; fervid
   - fierce, tearing, vehement, violent

See also: intense, irresponsible

• oculist
• oculomotor
• oculomotor nerve
• oculopharyngeal muscular dystrophy
• oculus
• oculus dexter
• oculus sinister
• Ocyurus
• Ocyurus chrysurus
• OD
• odalisk
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• odd
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• odd fish
• Odd Hassel
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• odd man out
• odd one out
• odd-even check
• odd-job
• odd-job man
• odd-leg caliper
• odd-pinnate
• odd-pinnate leaf