The world could be divided between those who love liver and those who hate it, and Guy Fieri is the latter. He's mentioned he finds liver "nasty" and doesn't often eat it.
Guy Fieri uses eggs in his recipes but doesn't eat them by themselves due to a bad experience with an overcooked boiled egg and finding a chick inside an egg as a child.
Chitlins are the large intestines of pig, cow, lamb, or goat. Fieri tried them at Cora Faye's Cafe in Denver, Colorado, but had a tough time with the overwhelming stench.
Though it was once popular and common, Guy Fieri isn't alone in disliking cow brains. He was served it on an episode of "Diners, Drive-Ins, and Dives" and nearly vomited.
Haggis consists of a variety of organ meat mixed with oats or breadcrumbs. On a Triple D episode, Fieri grimaced as he watched it being made at Mac's Fish 'N Chips.