A phrase used in the Military Intelligence field of the US Army to describe when someone (A 35F) has stolen a 35H/G/S's hard work and used it as their own to gain merit within their unit. Used to refer to a person of ill refute.
35H: Dude, did you see that douche
35G: Yeah, he totally used that product you made last week, and made it off as his.
35H: Man, he screwed me over bad, Like A Fox