The dingolfy originated in Malayalam cinema sometime around the 90s, when Malayalers were desperately in need of an umbrella euphemism that could encapsulate all of their prudeness around matters of lust. With its imported foreign goods sound, and clunky alien charm, dingolfy quickly became the catch all term for all (supposedly) sleazy behavior in the fetid Malayali imagination.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.