Welsh rabbit

noun
1.
a dish of melted cheese, usually mixed with ale or beer, milk, and spices, served over toast.
Also called Welsh rarebit.
Origin
1715-25; probably of jocular orig.; later Welsh rarebit by folk etymology
British Dictionary definitions for Welsh rabbit

Welsh rabbit

noun
1.
a savoury dish consisting of melted cheese sometimes mixed with milk, seasonings, etc, on hot buttered toast Also called Welsh rarebit, rarebit
Word Origin
C18: a fanciful coinage; rarebit is a later folk-etymological variant