A very long word that can have any particular meaning that takes your fancy. Mainly used as a nickname, or someting to say in awkward conversation if you are very bored and you like to confuse people.
annoying smart smug girl: Im so smart, i know so many big and long words. Your vocabulary is shocking compared to mine!
normal girl: ..I dont give a fuck. slickadelaphante, bitch!
annoyingly smart smug girl: slicka- what?
normal girl: yeah bitch! you stupid girl!