Corruption of the word 'tune'; Used as a description of an excellent song, often accompanied by a T shape made with the hands. Pronounced: chyown with a particular emphasis on the long yow sound.
"Retreat Retreat is such a tchyowne!"
Crazy Rich of the Day
Rich - Ogre
Kerry is looking fine, but Rich - oh my god how does he do it.
the ol' one-two!