What is "spear tackle"

n. (context rugby English) A offensive tackle in which the tackled player is lifted up and driven into the ground head-first. This is very dangerous which can result in serious injury to the neck and spine and often a red or yellow card.

A spear tackle is a tackle in rugby union, rugby league and Australian rules football in which a player lifts another player into the air and drops them such that they land on their back, head or neck. Spear tackles have caused serious injury including spinal damage, dislocations and broken bones in the shoulder or neck.