Jibchemish
The language chemistry homework problems are written in. To most people it looks like random letters and numbers arranged to resemble Michael Jackson's face. Only super geniuses can read an understand it.
Student 1: "Did you understand last night's chem homework?''
Student 2: "Of course not. It was written in Jibchemish."
Student 2: "Of course not. It was written in Jibchemish."