bubble line
n.— «There was more than a glimmer of hope this year that Congress would finally ante up $5.5 million needed for a planned oxygen system to improve striped bass fishing at Thurmond Lake.…The proposed oxygen system, which anglers refer to as a “bubble line” that releases pure oxygen along miles of submerged pipes perforated with tiny holes, was designed to offer opportunities for striped bass to congregate in the Modoc area.» —“Hunting accidents are on the decline thus far” by Rob Pavey Augusta Chronicle (Georgia) Dec. 24, 2006. (source: Double-Tongued Dictionary)
Further reading
Megan from Savannah, Georgia, is curious about a phrase her father used: down cellar behind the axe, a phrase whose meaning she never quite understood. Down cellar, meaning “down in the cellar,” is common in New England and the Canadian Maritimes...
A Navy veteran recalls hearing the Southern expression fat lighter from his wife’s family in Troy, Alabama. It denotes an old, resin-rich pine wood that becomes highly flammable as it ages. Fat lighter is prized as kindling and often called fat...