noun, plural bar·rel·fuls.
Examples from the Web for barrelful
There ain't a dipper left in the ship, and the water pourin' in by the barrelful!The Old Tobacco Shop|William Bowen
All knew that there was over a barrelful of the inflammable liquid in the tank on the upper deck.Virginia: The Old Dominion|Frank W. Hutchins and Cortelle Hutchins
The country to the leeward of Kilauea shows an abundance of Pele's hair, and it may be gathered by the barrelful.The Wonder Book of Volcanoes and Earthquakes|Edwin J. Houston
Every time we breathe, we spoil at least half a barrelful of air.First Book in Physiology and Hygiene|J.H. Kellogg
Look at old Jan Domeny, he hasn't an apple-tree in his garden, and yet he made a barrelful of cider this October.Thomas Hardy's Dorset|Robert Thurston Hopkins