To invoke a feature of a telecommunications system that rejects incoming calls. See also do notdisturb.
"busy out." YourDictionary, n.d. Web. 14 January 2019. <https://www.yourdictionary.com/busy-out>.
busy out. (n.d.). Retrieved January 14th, 2019, from https://www.yourdictionary.com/busy-out
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