What the heck does Radio Wallah mean?
Wallah is a Hindi word that is widely used in northern India to mean ‘the person in charge of some task or work’. For example, the man who parks your car would be the ‘parking wallah’, and a man who sells bread is the ‘bread wallah’.
In my experience, radio wallah tends to refer to a man who operates or services radios. That, or to the dude in some rural Indian towns who stands around with his transistor radio so that folks can listen to whatever is playing. As it applies to my site, Radio Wallah might be simply read to mean ‘radio person’ or ‘radio fellow’.
From the Oxford English Dictionary