slack up

1. 1.

   make less active or fast

   “He slackened his pace as he got tired”

   “Don't relax your efforts now”

   Synonymsslackslackenrelax

   Broaderdecrease

Questions about slack up

What does slack up mean?

slack up means "make less active or fast".

What is another word for slack up?

Close synonyms include slack, slacken, relax. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.