slack up


Also found in: Thesaurus, Idioms.
Related to slack up: slack off
ThesaurusAntonymsRelated WordsSynonymsLegend:
Verb1.slack up - make less active or fast; "He slackened his pace as he got tired"; "Don't relax your efforts now"
slacken, slack, relax
minify, decrease, lessen - make smaller; "He decreased his staff"
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