Gastromancy 

Telling fortunes from the rumbling of the stomach.

Person 1: *Stomach rumble* Woah! My stomach tells me there's a cute ass girl coming into our lives today!
Person 2: Stop gastromancy ing!

Gastromancy by PandaGirl xox May 30, 2016

gastromaniacal 

Affected by an obsessive focus on a particular food.

More than once, his gastromaniacal zeal for hot dogs landed him in the dunny with the sharts.

gastromaniacal by goodmanjm July 7, 2009