Alibi is a language game spoken by children in Australia. It is not a true language, instead an obfuscation of English. It is a system of manipulating the syllables of spoken words to render them incomprehensible to the untrained ear. The language can be easily mentally encoded and decoded by a skilled speaker at the rate of normal speech, while those who either don't know the key or aren't practiced in rapid speech are left hearing nothing but gibberish.