What is "nobbut"

Usage examples of "nobbut".

We gat on varry weel for a bit, An aw stuck to mi wark like a man, An enjoying mi hooam, thear awd sit, As a chap at works hard nobbut can.

To some a despisable dish, But it allus comes welcome to me, If awve nobbut as mich as aw wish.

Nobbut a dozen a' th' barbs, loik they said, even th' slaves've run er been sent off.

Jeff said if you'd nobbut cut tail off, that cow would have gotten up and walked away.