pick up the slack - definition of pick up the slack by The Free Dictionary
slack 1 (slăk) adj. slack·er, slack·est 1. Not tense or taut; loose: a slack rope; slack muscles. See Synonyms at loose. 2. a. Lacking in activity; not busy: a slack season for the travel business. b. Moving slowly; sluggish: a slack pace. 3. Lacking in d...