tromboning
n.β Β«A prime example is the historical monopolisation of the telecoms sector by Telkom. In order to deliver cheaper calls we have been forced to resort to a method called tromboning. Here, we actually re-route calls to international service providers and back to South Africa in order to reduce call costs.Β» ββLocal not so lekker” MyBroadband (South Africa) Feb. 3, 2009. (source: Double-Tongued Dictionary)