Me mate had a big night on the "turps" and is a bit "doughy" s'morning... eh.
My friend had too much to drink last night and is not well at all this morning.
eh is tacked onto the end of a sentence, and has many uses, interpretation depends on context, facial expression and temperment, and is peculiar to northern New South Wales and Queenslanders.
If you want to blend in with the locals just talk......real.........slow.........and.... say...... eh .....at the end of each sentence
Mind you, all you guys over the pond cant talk proper anyhow