He is a fast/slow 'walker'. [=he walks at a fast/slow pace]
She joined a group of 'walkers' in the neighborhood.
(..) You built that wall to keep us out. Since when do the crows give two shits if we live? Jon: The white walkers don't care if a man's free folk or crow. We're all the same to them, meat for their army. But together we can beat them. Beat the white walkers? Good luck with that. Run from them, maybe. It's not a trick. It's a gift for those who join us. (..)2015 TvShow: Game of Thrones Title: Hardhome Season: 5 Episode 8