sleepwalking

/S L IY1 P W AO0 K IH0 NG/
verb
  1. 1

    To walk and/or perform other actions while sleeping; to somnambulate.

noun
  1. 1

    The act of walking while not conscious or aware of it, during one's sleep.

Source: https://en.wiktionary.org/wiki/sleepwalk, https://en.wiktionary.org/wiki/sleepwalking