He is a fast/slow 'walker'. [=he walks at a fast/slow pace]
She joined a group of 'walkers' in the neighborhood.
(..) I said get your hands off her. You're gonna get yourself killed. Your lover Jon Snow's not here to save you. I killed a white walker, I killed a Thenn. I'll take my chances with you. - I'm all right. - You're not. Just a bit woozy. (..)2015 TvShow: Game of Thrones Title: The Gift Season: 5 Episode 7
(..) Safe travels, Lord Commander. Thank you, Sam. Oh, um... It's dragonglass. It's what I used to kill the white walker. I hope you don't need them. Me, too. Yah. There he is. That laugh. (..)2015 TvShow: Game of Thrones Title: The Gift Season: 5 Episode 7