Kinktionary
More like guidelines and a lot less like definitions.
Rope Bottom
A person who has the rope tied on them during rope bondage or rope play.
Note that while submissive roles are typically written in lower case (both on Fetlife and as a more general style guideline in many BDSM communities), a rope bottom typically isn't assumed to be a submissive role in the rope community.
Alternative terms for rope bottom include: