Raftman is the name of an ale brewed by Unibroue since 1995. Its distinctive smoky flavour is due to the use of whisky malt. Unibroue recommends serving it with smoked fish, smoked meat, or mildly spicy food. 5.5% alcohol by volume.
So what does raftman mean? Not just any "man engaged in rafting," but specifically a draveur, a log-driver transporting wood (tied together into a raft) to a mill. Here's what Unibroue had in mind when they came up with the name, according to http://www.unibroue.com/produits/raftman.cfm:
La bière la Raftman a été créée en mémoire de ces hommes, à la fois bûcherons, draveurs et raftmen, qui terminaient une journée de dur labeur autour d'une bière et d'un whisky.