The jib is a head sail used for sailing down wind and some say that it is sailor slang for the face. Hence, to like the cut of your jib is a complement as to the shape of your face.
Spying an attractive young lady across the bar, Rusty approached her and said, "I like the cut of your jib". He was duly rewarded with a pint of ale in the face.
by optimalforager April 29, 2008