Feeding onelook with "soer*" gives, among other choices "soeren kirkegaard" so I thought it might be "søresmus". I googled that (with o for ø) and got a little better results, but not much better. What I found was this (emphasis mine):
pp 665-6
At Borras (being the House of Edward Brereton, then High sheriff for the
County of Denbigh) on Chmrtnass in 1597 there was all the HoUdays a
Drum a Colestaff and a Book, whoever was taken in Bed after the first sound 15
of the Drum, or with never a penny about him or played for more than he
had to pay, or was found Drunk, or a common swearer, should ride this
Colestaff and be gallantly carried about the Court and the Hall, with the
Drum beating before him Royally; Huw Gryffydd being one of the Company
did often times offend in the Premises, one Sam«^/ Powell hearing so much, 20
wrote to him this Hodge-Podge or Soresmus following I
"Die Huw is it true, is tre, te nudum
Tan aden Borrassi?
Accw itti Aquitare
Cowlstaff trwm, post Drwm y dre 25
whereas Sam«^/ Vavfell thought by te nudum the bare Cowlstaffl Gryfi^'^
takes it otherwise, as if he meant his attritas Togae, his bare apparell, and in
that sense he answer'd him with this mingle-mangle following
"I ride without Pride, ar y Pren, in Borras
Byrroes fyddo i'r Cwlbren 30
Si nudus sum /Pen floeden/ ne Hoeden
Cave tu, eb'r Huw hen.
Looks like a sort of Europanto.
