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1.
It's a common mispronnounciation of "Roger That" or sometimes even a malfunction in a radio circuit that will make someone sound like they are saying "Royer that"
On the CB Radio

Blackpig I got a band bus blocking me from making the right turn onto I 59, gonna need to take the toll road

Royer That Niner Yankee
by Srapples April 28, 2013