1. Cheerfully irresponsible
   - carefree, devil-may-care, freewheeling, happy-go-lucky, harum-scarum 
2. Dazed from or as if from repeated blows
   "slaphappy with exhaustion"
   - punch-drunk, silly

See also: confused, irresponsible

• blabber
• blabbermouth
• blabbermouthed
• blabby
• Blaberus
• black
• Black Africa
• Black African
• Black American
• black and gold garden spider
• black and white
• black Angus
• black apricot
• black archangel
• black art
• black ash
• black bamboo
• black bass
• black bead
• black bean
• black bear
• black bearberry
• black bee
• black beech
• black belt