Sc. and north. dial. [Of obscure origin: cf. TWIT sb.2 and TWITTER sb.3] trans. To spin or twist unevenly, to make ‘twitty.’

1

1674.  Ray, N. C. Words, 50. To Twitter Thread or Yarn, is to Spin it uneven.

2

1828.  Craven Gloss., Twitter, to entangle, as thread which is too hard twisted.

3

1843.  Whistlebinkie (1890), II. 165. Baith twittered and knotty’s the thread o’ our life.

4