[Nevadaref]

Originally Posted by cbfoulds

Naturally, it all depends on what is being said. However, assuming this is common, ordinary griping and not any kind or level of abuse, what has worked for me and my teenage son who is a recently-new ref is,- at the first stoppage opportunity when you are near enough to the chirping coach that (s)he will definitely see and hear you - and preferably [but not necessarily] while (s)he is chirping:
1) Hold up the restart;
2) Laser-serious stare at the offender;
3) Hold up your hand in the "STOP" sign;
4) "Coach, that's enough - you coach and I'll make the calls as referee, OK?"
Do not do this quietly/ inobtrusively, you want everyone on his sideline to know that you have disciplined the coach. [It is NOT necessary that you be loud enough that the other team knows what you said, much less the spectators: but if they do, that is not a bad thing]
5) IMMEDIATELY turn & restart - do not entertain any discussion or comment.
6) IF Coach Puffbuttock continues in any way, or gives you any static at all about what you just said, whack him/her at once with a caution for dissent.

I very much doubt that you will have to do #6.

Keep it short and don't say anything that will invite a return quip.