·p.pr. & ·vb.n. of Sag.
II. Sagging ·noun A bending or sinking between the ends of a thing, in consequence of its own, or an imposed, weight; an arching downward in the middle, as of a ship after straining. ·cf. Hogging.
To drift off bodily to leeward. The movement by which a ship makes a considerable lee-way. ...
The Sailor's Word-Book