We found 4 definitions of slacken off from 2 different sources.
Verb |
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slacken off - become less intense | ||
ease up, ease off, flag | ||
decrease, diminish, lessen, fall decrease in size, extent, or range; "The amount of homework decreased towards the end of the semester"; "The cabin pressure fell dramatically"; "her weight fell to under a hundred pounds"; "his voice fell to a whisper" |