Hey, the Haggis o' Dunbar
   Fatharalinkum Feedle;
   Mony better, few war,
   Fatharalinkum Feedle.

   For to mak' this Haggis nice
   Fatharalinkum Feedle,
   They put in a peck o' lice
   Fatharalinkum Feedle.

   For to mak' this Haggis fat
   Fatharalinkum Feedle,
   They put in a scabbit cat,
   Fatharalinkum Feedle.

...and presumably you carried on adding as many revolting ingredients
as you could find rhymes for.

There's a tune for it from the late 18th century, about the same time
that C.K. Sharpe collected those words. Presumably only the first bit
is the song, the second half is an extension to turn it into a reel.

X:1
T:The Haggis o' Dunbar
S:Gow & Sons 2nd Repository
N:book has key signature A, but has accidentals on all the G's
N:except for the one in the last bar, which I regard as optional
Z:Jack Campin , October 2000
M:C|
L:1/8
K:A Mixolydian
e|{d}c>BAc    E/E/F (G2| G/)B/c    dG {=c} B2 GB|\
{d}c>BAc    E/E/E (A2| A/)c/d    ed    Tc2 A:|
c|   Ac/d/ eA cAeA    | GB/c/    dG {=c}TB2 GB|\
    Ac/d/ eA cAeA    | Ac/d/    ed    Tc2 Ac|
    Ac/d/ eA cAeA    | GB/c/    dG {=c}TB2 GB|\
    Tc>BAc    E/E/E A2|(a/g/f/e/) a>e    Tc2 A|]