C'mere 'till I tell ye! - Irishisms (or Hiberno-English)

Reading material:

https://www.fluentin3months.com/irish-english/

Let’s have the craic Dopers. Yer big eejits.

I didn’t wade through your ‘reading material’, but an Irish friend of mine says “It’s yourself, isn’t it?”

Sorry, maybe it was too much. What does “it’s yerself, isn’t it” mean?