The Mast Plan Hai meme originates from the 2006 Indian film Phir Hera Pheri. In this Bollywood movie, Baburao (the character played by Paresh Rawal) says this dialogue to Raju And Shyam when Raju Raju hatches a plan for three of them to steal from Munnabhai. The popular use of Mast Plan Hai meme is to mock someone who has agrees with the idea.
