Kinktionary
More like guidelines and a lot less like definitions.
Fuckdoll
A fuckdoll is someone who allows another person, generally a Dominant or Top who owns them, to use their body for sexual gratification at their whim. This can include specific positions and going limp to be moved like a doll.
Fuckdoll is very similar to the fucktoy role. Fuckdoll has the implication and/or expectation that the Dominant or Top will utilize dollification/bimbofication for presentation.
The fuckdoll may also be slutted and/or loaned out for others to use as part of a scene, punishment, reward, or rule set within their dynamic.
I.E., someone’s living sex doll.