An Indian mythical entity that tears off its victims heads and eats them. Used colloquially to describe a voraciously hungry individual who will eat human beings if necessary. Constantly bellows fee fie fo fum in public forums. The ratna's appetite can be deceiving due to its normal appearance but it will consume you if it has not been feed recently... In Indian folklore the ratna was a originally a young relatively diffident girl who made squeaking sounds all the time, and was subsequently turned into a monster that incessantly felt hunger in order to quell the squeaking.
"look he has six burgers!"
"what a ratna”