See here, Nelson, I can't have this work slack up.

Business is liable to slack up just when you think it's going along all right.

I'll let her run at this rate for a while, and then we'll slack up.

The moment you slack up on them is the moment they slack up in their work.

The work didn't slack up none.

Going with her, it's too easy to slack up, let your mind wander and let the river take you.

You haven't got the great Army man to beat, and, just for that reason, you slack up on your efforts.

One of the gentlemen hailed him in German with the request to slack up a little and they would come off in a boat.

The driver, with a surprised look on his face, was slacking up.

That work was slacking up so he'd decided on a ten per cent.

At that the horses slacked up a bit.

The indicator slacked up, fluttered, stopped dead.

"We're way back now, and don't seem to be slacking up, either."

I had crossed it once and knew that it was weak and shaky, and I slacked up and watched him.

Slack up, if you please, and let me have all the line you can, without casting off from your body.

' Slack up your grip in my dress shirt,' says Uncle Emsley, 'and I'll tell you.