Maul

From DwarfFortressWiki

The Maul is a very large heavy hammer (similar, if not bigger, to a sledge hammer) and is the highest damaging wieldable weapon in the game, despite being a bludgeoning weapon. It can only be wielded by a human, even then, it requires both hands.

It uses the hammerman skill.

In fortress mode, goblins can wear both a maul and a shield.