mephitis

/M IH0 F AY1 T AH0 S/
noun
  1. 1

    A poisonous or foul-smelling gas, especially as emitted from the earth; an unpleasant smell.

  2. 2

    A dilution of fluids derived from skunks or polecats.

Source: https://en.wiktionary.org/wiki/mephitis