Did you mean slack?
slack
noun
°Small coal; coal dust.
°A valley, or small, shallow dell.
adjective
°Lax; not tense; not hard drawn; not firmly extended.
°Weak; not holding fast.
verb
°Slackly.
°(followed by “off”) to procrastinate; to be lazy.
synonyms: culm, slough, slow, moderate more» , easy