Ulstur

n.

An inflammatory and often suppurating lesion on the skin or an internal mucous surface.

In use

I haves an ulstur on me lip dad, will ye get me de bonge eile?

Let Lawrence Muck translate it to posh English for you
Lawrence Muck

Hello. I've just had my tea. Would you like me to translate 'Ulstur' in use for you?

I have an ulcer upon my lip, Father; would you fetch me the other ointment?