'slack up' definitions:
verb
Make less active or fast; "He slackened his pace as he got tired"; "Don't relax your efforts now" [syn:
slack,
slacken, slack up,
relax]
Words containing 'slack up'
- Slack,
- Slacked,
- Slacking,
- Slackly,
- Slackness,
- slack off,
- slacks,
- Slack hand,
- Slack in stays,
- Slack water,
- slack suit,
- slack tide,
- Air-slacked lime,
- Slack-water navigation,
- esther hobart mcquigg slack morris