Instead of saying fuck, or any other foul language, especially when there are young children around. Its just as meaningful, if everyone knows what it means, plus the fact that it is fun to say, and it avoids getting dirty looks and getting yelled at by teachers.
Girl 1: Did you remember to get the money from your mom.
Also "what the fuddmucking fudd," or simply "fuddmuffins."
"What the fuddmuffins, Lucas! Don't do that shit." & "What the fuddmucking fudd, that girl's name is Rainbow!" & *rear-ends someone's car* "OH FUDDMUFFINS!"
Spawning from a bizarre idea for food, this word can substitute for any curse word. It can also be used randomly. Literally, a muffin made out of fudge.