idioms

  work against the clock (to work as fast as possible and try to finish something before a certain time) We are working against the clock to finish the job on time. You’ll have to work against the clock if we want to meet the deadline. envocabulary.com

  hit the sack (go to bed) Come on, everyone, it’s time to hit the sack. I feel really sleepy. I’m going to hit the sack after supper. Let’s hit the hay; we need to make an early start tomorrow. Also: hit the hay     envocabulary.com

  from the word go  informal (from the beginning) Our marriage was a disaster from the word go. Let’s have everything clear right from the word go.   envocabulary.com

  from scratch (from the beginning, without making use of any previous work) I have my own business that I started from scratch. The fire destroyed everything, so we’ll have to do the whole thing again from scratch.   envocabulary.com

  the best part of (most part of) We spent the best part of a day cleaning up after the party. He drank the best part of a bottle of rum on his way back from the shop. also: better part of   envocabulary.com