Yer like a convict
What an Irish mammy says on seeing your fresh, tight haircut.
Who scalped ya? Yer like a convict!

Shall I translate it into posh English for you, boss?
Ahoy there. Nautical, I know. Here it is in posh English.
Who has shorn you so savagely? You resemble an escaped felon!
Questions
What does yer like a convict mean in Ireland?
What an Irish mammy says on seeing your fresh, tight haircut.
How do you use yer like a convict in a sentence?
“Who scalped ya? Yer like a convict!”
Updated
On the list: Irish slang phrases