furl in a body, Nautical. to furl (a square sail) with loose canvas gathered at the mast, so as to make a harbor furl.
6.
furl in the bunt, Nautical. to furl (a square sail) by gathering canvas upward, so as to load the yard equally at all points.
Origin: 1550–60; compare Middle French ferler in same sense, perhaps representing Old French ferlier to chain, fasten, equivalent to fer firm (< Latin firmus) + lier to bind (< Latin ligāre)
1550s, possibly from M.Fr. ferler "to furl," from O.Fr. ferlier, perhaps from fer "firm" (from L. firmus; see firm (adj.)) + -lier "to bind" (from L. ligare). Related: Furled; furling.