English dictionary slack up meaning and definition Definition and meaning of slack up at MeaningMonkey.org. slack up meaning and definition in the English Dictionary. SLACK UP verbDefinition of slack up (verb)make less active or fast"He slackened his pace as he got tired"; "Don't relax your efforts now"synonyms: relax, slack, slacken Source: Princeton University Wordnet
If you find this page useful, share it with others! It would be a great help. Thank you! Link to this page: