A word used to replace tuna when making a tuna salad sandwich for children.
Husband: "NO NO NO....do NOT use that word. The kids won't eat it...use seabeast instead!"
Little Buddy: "Daddy, what kind'a sandwich is this?"
Daddy: "Why that is a SEABEAST (said with deep powerful voice) sandwich little buddy...gives you big muscles!"
Little Buddy: - devouring sandwich - "Yum...GRRrrr....yummy".