Sheirrich

Sheirrich is the Minor God of Stench and Flatulence.

In Averland, whenever someone scents a foul odour in the air, they are quick to exclaim “Sheirrich’s Broken Wind!” The last person in the group to say it is believed to have created the stink whether they have or not, resulting in gales of laughter from their fellows.

Source

 * Warhammer Fantasy RPG 2nd ED -- Tome of Salvation pg. 82