sharting

/SH AA1 ER0 T IH0 NG/
verb
  1. 1

    To unintentionally defecate due to relaxing the anus to flatulate.

noun
  1. 1

    The act or process of the verb shart.

Source: https://en.wiktionary.org/wiki/shart, https://en.wiktionary.org/wiki/sharting