(at) top of one's lungs Meaning : To shout as loudly as you possibly can. Usage:The Class was so noisy that I had to shout at the top of my lungs to be heard.
(at) first hand Meaning :If you experience something yourself directly, without any intermediary, you experience it (at) first hand. Usage:Getting to see the performance (at) first hand is much better than watching it on you tube or videos .
(at the) touch of a button Meaning: you can do it very easily, often due to technology. Usage:From now on the safety officers can be alerted at the touch of a button.
Meaning :Someone who is as sly as a fox is cunning and clever at getting what they want Usage:Be careful of that manager. He's known to be as sly as a fox.
(all) hell broke loose Meaning :there was a sudden angry, noisy reaction to something. Usage:All hell broke loose when it was declared by the chairman that the factory was going to close down.
(all) hands on deck Meaning When there is a need for all hands on deck, everyone must help, especially during big function, task or event Usage:As the Annual day in School approached, it was all hands on deck to have everything ready in time.