Tamp is a verb that means to drive in or down by a succession of light or medium blows. It can also mean to press something such as soil or tobacco down firmly. Tamp is used to force in or down by repeated, rather light, strokes. It can also mean to pack down tightly by a succession of blows or taps. Tamp is often used to pack clay, sand, or dirt into (a drill hole) above an explosive. ^{merriam-webster.com 1 2 3 4}