A Drill

1. A tool used to remove material so as to create a hole, typically by plunging a rotating cutting bit into a stationary workpiece.
2. The portion of a drilling tool that drives the bit.
3. An activity done as an exercise or practice (especially a military exercise), particularly in preparation for some possible future event or occurrence.
4. Any of several molluscs, of the genus *Urosalpinx*, especially the oyster drill (*Urosalpinx cinerea*), that drill holes in the shells of other animals.
5. (uncountable, music) A style of trap music with gritty, violent lyrics, originating on the South Side of Chicago.