- a geared drill that can be braced against the chest for additional leverage.
Origin of breast drill
First recorded in 1860–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for breast drill
Drilling machines, both hand and power, hand and ratchet braces and breast-drill stocks.Practical Mechanics for Boys
J. S. Zerbe