It's a condition where an individual can not lunch on fish in all of it's cooking forms. Sushi not included.
Ahmad F: Hey man! Let's eat wings!
Ahmad B: No, I have oilotitus. Wanna eat fish instead, bruh?
Ahmad F: F- Fi- FISH?? Girl, I have fishotitus.
Ahmad B: Yall want to be me so bad.
Ahmad F: But hey! I'm down for sushi!