(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) 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.