Similar words: rack up, jack up, pack up, backup, back up, back-up, crack up, stack-up. Meaning: v. make less active or fast.
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1. The train slacked up as it came into the station.
2. Slack up the tent ropes before it rains.
3. Please slack up your speed. I can't run as fast as you!
4. The doctor advised Facer to slack up for few days, as his lifestyle was having a bad effect on his heart.
5. It's time to slack up a bit.
6. Slack up before you reach the cross - roads.
7. Don't slack up your effort , as we are getting to the end.
More similar words: rack up, jack up, pack up, backup, back up, back-up, crack up, stack-up, stack up, to back up, back-up copy, backup file, shack up with, slack, slacks, slack off, slackly, slacken, slacker, slacking, slacken off, slackness, slackening, cock-up, pick up, sick up, pick-up, suck-up, buck up, lock up.