D defs.my
Entry 2 senses Webster, 1913

Lit

/(lĭt)/ · IPA /ˈlɪt/
01 imp. & p. p. a form of the imp. & p. p. of Light.
  1. 1.
    a form of the imp. & p. p. of Light. See: Light
  2. 2.
    Under the influence of alcohol; intoxicated; inebriated; drunk; -- often used with up.[slang]