sea muffins Share definition Flag Sea muffins is a synonym for fun. It is used on occasions when "fun" is censored because of the first two letters. I'm going to have a lot of sea muffins in my AP Calculus class! sea muffins by Exhnozoaa February 24, 2007 0 0 Get merch Get the sea muffins mug. Buy Now — $32.95 See more merch