[f. as prec. + -ING2.] a. That makes fat. b. That is growing or being made fat.
1533. Elyot, Cast. Helthe (1539), 88 a. The diete of fattinge thinges dothe nourishe abundantly, soo that the stomake and lyuer do digest well.
1602. Middleton, Blurt, Master Constable, IV. ii. Ive fatting knavery in hand.
1767. A. Young, Farmers Lett. People, 86. Fed off by some fatting sheep.
1825. Cobbett, Rur. Rides, 458. A stout horse will eat much more than a fatting ox.
1865. Jrnl. R. Agric. Soc., 2nd Ser. I. 255. We believe in it [the pulper] for the young fatting animal.