Short for LUG-SAIL. Also Comb., as lug-rigged adj.; lug-boat (see quot. 1867).
1830. Marryat, Kings Own, xiii. Up with the lugs.
1859. All Year Round, No. 33. 148. My eye lights on certain lug-rigged boats bobbing along the waves. These are fishing-boats.
1860. Nares, Seamanship, 100. Sling a dipping lug 1/3 from the foremost yard arm; standing lug 1/4.
1867. Smyth, Sailors Word-bk., Lug-boat, the fine Deal boats which brave the severest weather; they are rigged as luggers, and dip the yards in tacking.
1884. H. Collingwood (W. J. C. Lancaster), Under Meteor Flag, 9. She was jogging easily along under her fore and mizzen lugs and a small jib.