Fiqrana hoke hum jiye, khamakha hum jiye na kyun..
Beparwah hoke hum jiye, khamakha hum jiye na kyun...
Simple as that, if you compare the two lines, you get to know that Fiqrana means something like Beparwah, a person who doesn't care. Carefree.
Actually Fiqrana means the same. The word is made of Fiqr, which means worry, some tension. Fiqrana is someone who is free of worries. Worryless.