I have heard this word commonly used when sports coaches are calling a group to come in. An example of radio by a sports coach is:

Radio, come in guys.

So what does it really mean? I live in Australia, so wondering as well if there are any other people around the world uses this term?

I have not heard any other people other than sports coaches say this.

  • 1
    Can you share an example of any coach saying this? It typically just means a radio check, to see if communication is good. It's not an official voice procedure or anything. Oct 3 '15 at 8:47
  • In the block quote is an example of what a sports coach might say. Maybe I didn't make it clear enough.
    – CipherBot
    Oct 3 '15 at 10:26
  • 1
    @CipherBot Michael meant a real-life example. Like a video clip or an article from the sports section of a newspaper. Basically the phrase is unfamiliar and we're looking for more context to work it out.
    – Dan Bron
    Oct 3 '15 at 10:30
  • Sports teams at a collegiate and professional level are increasingly using some sort of radio to communicate between the coach and players on the field. The above could be referring to that somehow, or it could simply be a bit of odd jargon for this particular sport and country.
    – Hot Licks
    Oct 3 '15 at 12:28
  • I don't know, but it seems quite possible there are already (or soon will be) wireless headsets activated by the wearer saying the word radio. At which point they would broadcast any immediately-following words to all other headsets monitoring the shared channel frequency (so the coach can easily address all members of his team even if they're widely spread out on a playing field, for example). Dec 2 '15 at 16:36

I've never it used, but my guess would be that it is a metaphor implying that the team is not paying attention, that they don't have 'their heads in the game'.

"Come in" is a phrase used in telephonic communication (over the airwaves, walkie-talkie), so its use here suggests that the audience is distracted, far away.

It sounds like a variation of a vernacular usage in US among friends "Earth to [Name], come in [Name]... "

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