dial. Obs. [Kindred in origin to KNAB v.1]

1

  1.  trans. To bite gently, nibble.

2

a. 1652.  Brome, City Wit, IV. i. Wks. 1873, I. 344. As you have beheld two Horses knubbing one another; Ka me, Ka thee.

3

  2.  To beat; to strike with the knuckle. Also NUB.

4

1721, 1828.  [see KNUBBLE v.].

5