Best definition
Similar to being a Pescetarian but goes one step further. You only eat fish. Nothing else. Similar to the commonly used YOLO, made famous by Drake’s ‘The Motto’ this neologism has become popular as both a joke term and for those who only eat fish.
Person 1 – “Gotta get those Omega Fish Oils.”

Person 2 – “Oh, i forgot you were YOEF”

Person 1 – “every day, every day, every day.”