Aafaton ke Parinde is the phrase used for beginning the title song of Ishaqzaade. The meaning of phrase literally would be 'birds of troubles', that is flyers who are ready to take risks and play with troubles.
The phrase is used here to convey the sense of freedom, and fearlessness. However, personally I feel that the phrase is more or less an extension of Yash raj's Lafangey Parindey.