at the top of (one's) lungs
As loudly as one can. I've hardly slept because my infant has been crying at the top of her lungs all night. Sing at the top of your lungs so that the people in the last row of the auditorium can hear you! Kids, can you please stop screaming at the top of your lungs?
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.
at the top of one's lungs
Also, at the top of one's voice. With an extremely loud voice. For example, The babies in the nursery all were crying at the top of their lungs. The noun top here refers to the greatest degree of volume (that is, loudest) rather than high pitch, a usage dating from the mid-1500s.
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.