Mauloch, called "Mountain Fart" by some Nords, refers to the Daedric Prince Malacath, who is traditionally worshipped as a patron deity by the Orsimer. Mauloch is also one of the Testing Gods of the Nord pantheon, which are gods the Nords guard against rather than worship.
Mauloch frequently engaged in hostilities with the Nords of Skyrim. Eventually, however, he was defeated at the Battle of Dragon Wall in 1E 660 and fled. According to legend, his intense anger as a result of this "was said to fill the sky with his sulphurous hatred, later called the 'Year of Winter in Summer,'" referring to the eruption of Red Mountain in Morrowind, which occurred around the same time in 1E 668.