Peg away

‘Art's the only thing I care for, I'm willing to give my whole life to it. It's only a question of sticking to it and pegging away.’

You are tired now and you find it hard, but you peg away.

In very rare cases, when the matrix just goes on pegging away automatically, the doctor can take advantage of that and ease out the second brat who then can be considered to be, say, three minutes younger [...].