Who coined the phrase shout out?

The days of dignified expressions particularly on radio are sadly now consigned to another age. Asking for a request or dedication has now been mongrolised into a 'shout-out', no doubt coined by some inarticulate knuckle dragging cretinous local radio dj in the incessant search for everything to sound more 'cool'. Personally I'd suggest the perpetrator sticks his backside in a fridge.

Thom McKeown