So many synonyms.
  1. Tight
    Ernest Hemingway's preferred adjective.
  2. Tiddly
    Ex. "She got a bit tiddly down at the pub." -Jimmy on Downton Abbey
  3. Schnockered
    Learned this one from Martin in The Parent Trap
  4. Sloshed
  5. Sauced
    First heard from @scaleyjo
  6. Inebriated
    Just like a really solid word.
  7. Turnt
  8. Pissed
    Think this one is pretty British. Use with caution in America.
  9. Smashed
  10. Intoxicated
  11. Tipsy
  12. Three sheets to the wind
    According to my dad
  13. Munted
    According to my sister who spent time in the UK
  14. Borracho
    Spanish. Other languages are fair game.
  15. Hammered
    A classic in the bro dictionary
    Suggested by @brynelle
  16. Buzzin
    Suggested by @brynelle
  17. Antsy to dance-y
    Definitely code for how our friends tell each other we're feeling it.
    Suggested by @bailey