[An etymologizing alteration of prec. There is no evidence of the independent use of rarebit.] = prec.
1785. Grose, Dict. Vulgar T., Rabbit, a Welch rabbit, bread and cheese toasted, i. e. a Welch rare bit.
1845. Alb. Smith, Fort. Scatterg. Fam., xliii. One of those inextricable visions which are alone dependent upon love, or Welsh rarebits, for their origin.
1865. Morn. Star, 10 April. Then you advance to steaks, thence to marrow-bones, thence to Welsh rarebit.
1905. H. G. Wells, Kipps, I. vi. § 6. He had also eaten two Welsh rarebitsan unusual supper.