One of the mysteries of the English language finally explained.
1Fishing informal. The person who or boat which catches the most fish during a particular period of time; frequently as a title.
2Forestry. In logging: an overhead cable attached high above the ground to a spar tree, used to haul logs out of the forest. Also attributive in "high-line logging". Compare high lead. Now historical.
Mid 19th century. From high + line.
high line/ˈhʌɪ lʌɪn/
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