Tin Woodman

The Tin Woodman is a character in The Wonderful Wizard of Oz. A resident of the land of Oz, he is a tree cutter who has been turned into tin.

Wolverine knew of the character. When he encountered Sentinels in the forest, he called one a Tin Woodsman that he would send back to Oz, meaning to destroy it.

Background
Wolverine clearly says Woodsman, which is incorrect and only seen in various adaptations. In the original book he is referred to as Woodman and rarely just Tin Man.