Silver action!
I get this all the time. At the sawdust joints where I play "green action" is the equivalent of calling out "checks play." If you bet $25 in red they call checks, if you bet $25 in green they call green action. This will change from casino to casino, but the ones I've played in are usually pretty consistent.
Don't worry about calls like this to the pit. The dealers are required to do it whenever a certain betting level has been reached or exceeded. Usually the pit will just waive it off. Still, try to be aware of when the dealers make the calls and how the pit reacts to each one. They probably won't waive off your third "checks play" call.
If a certain dealer keeps calling on me, I will sometimes call it out with them just to annoy them. I will yell in my loudest, drunkest voice right along with them. Some dealers will burst into laughter. I actually had one dealer who let me announce ALL of the calls for her. Whenever I put out my max bet I would yell "checks! I got checks over here! Get your checks here!" The pit would look at me and laugh it off without even looking at the felt. Before long I was calling out "red action!" and "silver action!" One time I called out "purple action...ha ha, made you look!" I got away with MURDER that day! Just be VERY CAREFUL not no be overly obnoxious. An angry dealer or annoyed floorman can mean instant death.
-Sonny-