Synonyms for Slap-happy:

• adj.

  •addled (adjective)
  • bewildered,
  • thrown,
  • Punchy,
  • fouled up,
  • shook,
  • befuddled,
  • gone,
  • unglued,
  • shaken,
  • shook up,
  • mixed up,
  • out of it,
  • woozy,
  • balled up,
  • rattled.
  •confused (adjective)
  • addled.
  •dizzy (adjective)
  • disturbed,
  • vertiginous,
  • dazed,
  • dumbfounded,
  • weak-kneed,
  • fainter,
  • Staggered,
  • groggy,
  • faint,
  • out of control,
  • puzzled,
  • hazy,
  • weak knees,
  • shaky,
  • staggering,
  • blinded,
  • unsteady,
  • tipsy,
  • blind,
  • upset,
  • bemused,
  • off balance,
  • wobbly,
  • Reeling,
  • giddy,
  • dumb,
  • muddled,
  • light,
  • gaga,
  • whirling,
  • weak in the knees,
  • distracted,
  • dazzled,
  • swimming,
  • up set.
  •punch-drunk (adjective)
  • baffled,
  • dumbstruck,
  • lost,
  • perplexed,
  • agog,
  • flustered,
  • confused.
  •reeling (adjective)
  • lightheaded.
  •woozy (adjective)
  • queasy,
  • seeing stars,
  • light-headed.

• Other synonyms:

  •punch-drunk
  • punished,
  • spacey,
  • beaten,
  • silly.
  •Other relevant words:
  • flibbertigibbet,
  • dopy,
  • dopey,
  • flighty,
  • frivolous,
  • scatterbrained,
  • dippy,
  • wool-gathering,
  • Rattle-brained,
  • hare-brained,
  • Rattle-headed.

Antonyms for Slap-happy:

• adj.

  • addled
    understanding, clear.
  • dizzy
    heavy, unconfused, clear-thinking, sensible, unshaky, steady, aware, Clear-headed, smart.
  • woozy
    sure, sober, certain, stable, cognizant.