toe popper
n.β Β«The VC use anything and everything to build their devilβs devices. There were toe poppersβnormally a single bullet no bigger than a pencil, set on top of a nail; step on it, and the bullet pushed down into the nail and fired through your foot.Β» βby David H. Hackworth Steel My Soldiersβ Hearts May 7, 2002. (source: Double-Tongued Dictionary)