idioms

  hit the books  informal (to study or begin to study hard) I must hit the books now if I’m going to pass the test. My grades were getting bad, so my parents had me hit the books.   envocabulary.com

  crash a party (enter a party without being invited) I am not the kind of person who would crash a private party. Come on, guys. Let’s crash a party tonight.   envocabulary.com

  speak with a forked tongue (make false promises; say one thing and mean another) He always talks with a forked tongue, so I didn’t trust him an inch. The Prime Minister has been known to speak with a forked tongue.   envocabulary.com

  high gear  informal (a state of maximum or efficient activity) I studied hard before the examination, and my mind is in high gear. The project is starting to move into high gear.   envocabulary.com

  under lock and key (securely locked up; well protected) She keeps all her valuables under lock and key. I have three kids. That’s why I keep medicines under lock and key.   (in prison; in a place with no chance of escape) All the criminals are now securely under lock …