noun.
The state of being slack; the quality of having slack.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
the quality of being loose (not taut)
noun.
weakness characterized by a lack of vitality or energy
noun.
the quality of being lax and neglectful
Word Usage
"Ranks 'distinctive, booming growl of a voice earned him many imitators, and his sex-obsessed lyrics - while drawing criticism for their unrelenting "slackness" - made him one of dancehall's hottest sex symbols."