The fear that your food has been switched with, turned into, or replaced with tuna. This often occurs in those with severe allergies to tuna fish.
Guy 1: "Oh god! This peanut butter sandwich is made of tuna!"
Guy 2: "Dude, it's just peanut butter. I think you have TurnToTunaPhobia."
Guy 2: "Dude, it's just peanut butter. I think you have TurnToTunaPhobia."
by JohnsHopkins December 08, 2014