Refers to the fictional character "Leo"(AKA Parthiban) from the kollywood movie "Leo" directed by Lokesh Kanagaraj from the LCU.
It is a term which is often used as by the locals of TN capitalizing off of the "literally me" phenomena due to the dyanmic of his two faced personality.
"Watha naanthanda LEO DAS"-says the revolver equipped kid on deepavali(diwali for vadakans)