VTuber glossary
The vocabulary you will meet within a week of watching VTubers — oshi, seiso, zatsudan, rigging, redebut and more — defined plainly and without fan-wiki sprawl.
Every subculture builds a dialect; VTubers built theirs out of Japanese idol slang, streamer jargon and internet shorthand simultaneously. These are the terms worth knowing, defined the way people actually use them.
People and roles
- Oshi
- From Japanese idol fandom: the talent you support above others. "Who's your oshi?" is the scene's standard icebreaker. Supporting several is normal; the singular framing is traditional, not enforced.
- Talent / Liver
- Agency terms for their VTubers — hololive says "talent", NIJISANJI says "liver" (from "live-streamer", pronounced like the organ, to eternal confusion).
- Mama / Papa
- The illustrator who designed a talent's character. A character's "mama" may themselves be a famous artist — or another VTuber.
- Rigger
- The technician who takes the flat character art and makes it move (see Live2D below). Praised when expressive, memed when the physics misbehave.
- Clipper
- A fan who cuts streams into subtitled highlight clips. The scene's unofficial marketing department and most viewers' first contact point.
- Indie / Corpo
- Shorthand for independent versus corporate (agency-affiliated) VTubers. See the agencies guide for what the difference means in practice.
Career events
- Debut
- A talent's first official stream — for agency talents, a produced event with an announced date and often a simultaneous generation of debut-mates. Recent ones are tracked on our debuts page.
- Generation / Gen / Wave
- A batch of talents who debut together and typically remain a social and collab unit for their whole career.
- Graduation
- A talent's departure from activity or from an agency, framed as a milestone. Full treatment in the graduation guide; the historical record lives in our archive.
- Redebut / Reincarnation
- The performer behind a retired character returning as a new one. Politely never discussed in connection with the old identity.
- 3D debut
- The first showcase of a talent's 3D model — a milestone production with dancing, guests and staging, distinct from the original (2D) debut.
Stream formats
- Zatsudan
- A free-form chatting stream — no game, just talk. The format where personalities actually win or lose audiences.
- Utawaku
- A karaoke/singing stream. Milestone and anniversary utawaku are the scene's flagship free events.
- Endurance stream
- Streaming until a goal is reached — beat the game, hit the subscriber milestone — however many hours it takes.
- Collab
- Any multi-talent stream. Cross-agency collabs are events; full-generation collabs are traditions.
- Superchat reading
- A post-stream segment where paid messages are read and answered. Slower-paced, and where regulars actually converse with the talent.
Culture and technology
- Seiso
- "Pure/wholesome" — the idol-adjacent image some talents maintain, and the joke every talent makes when they inevitably fail to.
- Live2D
- The dominant avatar technology: a layered 2D illustration rigged for motion and driven by face tracking. Explained in What is a VTuber?
- Tracking
- The webcam- or sensor-based capture of the performer's face and body that drives the model. "Tracking died" is the format's signature technical difficulty.
- Fan name
- The collective name for a talent's community, usually announced at debut. Listed on each talent's profile here where officially established.
- Membership stream
- A stream restricted to paying channel members — typically looser and more personal than public content.
- VOD
- The archived recording of a live stream. VTuber archives are watched heavily — and their occasional deletion after graduations is why fan archiving culture exists.
Missing a term you keep seeing? Send it through the correction request page — the glossary grows from reader submissions.