忘光光

wàngguāngguāng
  1. (expressive) to forget completely; to utterly forget
  2. to forget completely; to utterly forget

Wiktionary

Entry Composition

1 忘 wàng
  1. to forget
  2. to overlook
  3. to neglect
2 光光 guāngguāng
  1. bright
  2. shiny
  3. smooth
  4. naked
  5. bald
  6. penniless