slackery adjective 1noun 1 adjective1 •(informal) Characteristic of a slacker.A few weeks later, at my new OB/GYN's office, I overheard a slackery teenage girl on the phone to her friend. — 2003 noun1 •Laxity; idleness; lack of requisite effort.The probability of a call to arms, not against Mexico, but against the almost almighty German Empire, was so great that it looked like slackery or cowardice to ask to be excused. — 1917
