A fictitious word introduced in Mary Poppins. Thought to be a nonsense word, but it contains elements of real Greek and Latin roots:
super: above, over, extreme
cali: beauty
fragilistic: delicate
expiali: to atone, to make amends
docious: educable, able to learn
Roughly translating to "atoning for extreme and delicate beauty while remaining highly educable".
My girl, Cydnee, is beyond gorgeous, beyond intelligent, beyond amazing. She is, quite perfectly, supercalifragilisticexpialidocious. She's a Goddess.