shillelagh

A wooden (traditionally blackthorn (sloe) wood) club ending with a large knob.

[T]he stem of a stout young oak or ash tree, into the end of which, where the roots had been rounded off, a quantity of molten lead was poured, making the shillelagh more formidable in such hands than a sword would have been – much harder to parry, and impossible to break.

It beats all your guns and your rifles, / For it goes off whene'er you desire, / And it's sure to hit just what it aims at, / For shillelaghs they never miss fire.

Any cudgel, whether or not of Irish origin.

A village in County Wicklow, Ireland.