What is "fat lute"

Fat \Fat\, a. [Compar. Fatter; superl. Fattest.] [AS. f[=ae]tt; akin to D. vet, G. fett, feist, Icel. feitr, Sw. fet, Dan. fed, and perh. to Gr. pi^dax spring, fountain, pidy`ein to gush forth, pi`wn fat, Skr. pi to swell.]

1. Abounding with fat; as:

   1. Fleshy; characterized by fatness; plump; corpulent; not lean; as, a fat man; a fat ox.

   2. Oily; greasy; unctuous; rich; -- said of food.

2. Exhibiting the qualities of a fat animal; coarse; heavy; gross; dull; stupid.

   Making our western wits fat and mean.
   --Emerson.

   Make the heart of this people fat.
   --Is. vi. 10.

3. Fertile; productive; as, a fat soil; a fat pasture.

4. Rich; producing a large income; desirable; as, a fat benefice; a fat office; a fat job.

   Now parson of Troston, a fat living in Suffolk.
   --Carlyle.

5. Abounding in riches; affluent; fortunate. [Obs.]

   Persons grown fat and wealthy by long impostures.
   --Swift.

6. (Typog.) Of a character which enables the compositor to make large wages; -- said of matter containing blank, cuts, or many leads, etc.; as, a fat take; a fat page.

   Fat lute, a mixture of pipe clay and oil for filling joints.

n. A mixture of pipeclay and oil for filling joints.