Obs. or dial. Also yollop. = GULP v.

1

1579.  E. Hake, Newes out of Powles (1872), D vij b. The pitchie burning pit … Shall yolpe them vp.

2

1881.  Leic. Gloss., Yollop, or Yolp, v. a., var. pron. of ‘gulp’ and ‘gulf.’

3