This aroused my curiosity, so I went looking for lyrics, and I found this, but I think it's incomplete; there seems to be a verse or two missing at the beginning. I had to piece together several "snippets" to get this much.

From a journal: Tocher; Tales, Songs, Tradition, [Edinburgh] School of Scottish Studies, Edinburgh University, nos. 25-30, page 44:

JOCK GEDDES AND THE SOO

...(?)

For Jock at mairket whiles got fou — [drunk
The place where scamps were there tae take him –
And so his mither at the door
Cries, "Come hame sober, Jock, ye nickum!"

REFRAIN: Braw, braw to bey weel likit [be
Braw, braw to bey sae bonnie:
Owre weel likit winna dae —
Sae muckle thocht on be sae mony. [by

But Jock as yaisual suin forgot [usual soon
The plain injunctions o his mither:
The mairket made him awfa dry —
The cyair wis whisky, deil anither! [cure

He met a freen as dry's himsel
An awa they went to weet their wezans: [throats
Glass efter glass they drank until
The total number cam to dizens.

Jock rase at last an made for hame:
He hedna taen his mother's biddin:
He couldna thrive – he tripped an fell
Wi aa his len'th alang the midden.

Jock jist lay still, fell fast asleep:
The drink had fairly stopped his kickin.
The soo cam by an smelt his mou,
An likin that, commenced the lickin!

Th'enormous soo still lickit on:
Cries Jock, "Noo, Jean, haud aff, that's plenty!
Let Kirsty hae a smack or twa,
For A'm shair ye hae haen mair than twenty!" [sure

At last his sober sense came roon
An lookin up saw Sandy Cam'ell
"Ye muckle, nesty, ugly brute,
Nae mair upon me will ye wammle! [roll

Jock rase an spat for near an 'oor:
The soo had played an awfu plisky! [trick
The pig was killed that very next day,
An Jock has niver since taen whisky.

Braw, braw, to bey weel likit,
Braw, braw it is, but bless me,
Owre weel likit winna dae —
A never thocht a soo would kiss me!