Shoken (初見 or しょけん) – A first-time viewer to the broadcast or chat.
Jitaku Keibi In (自宅警備員 or JK) – Home Security Guard, a term that hikikomori prefer to call themselves.
Nico Nama Cruise (ニコ生クルーズ) – An official broadcast that runs 24/7 and takes viewers to a random channel in the “凸待ち” category.
Oriru (降りる）- To get off, usually said when someone leaves Nico Nama Cruise to join a broadcast.
Nihongo de OK (日本語でおｋ) – Only talk in Japanese.
Otsu (おつ or 乙) – abbreviation for “otsukaresama”(お疲れ様), usually said at the end of a broadcast to thank the broadcaster.
8888 or パチパチ or 拍手 – clapping; used to express applause or praise when someone does something well.
Riajyu (リア充) – Someone who is satisfied in real life. Probably the equivalent of "normalfag"
tmt – abbreviation for “tomata” (止まった). Used when the broadcast has unexpectedly stopped.
Wara Wara (www or 笑) – the equivalent to "lol"
Arashi (荒らし) – A troll.
He (ヘ) - An image of a bent arm usually signifying “no.”
Oya Fura (親フラ) – A combination of the words Oya (親) and Flag (フラグ). Used by younger broadcasters when parents enter the room.
Enchou (延長) - Extension, used by broadcasters in reserved time slots to add 30 minutes or when voted to extent on Nico Nama Cruise.
Eroipu (エロイプ) – Dirty talk on skype
JK – an abbreviation of Jyoshi Koukousei (女子高校生) High School girl.
JC – An abbreviation of Jyoshi Chuugakusei (女子中学生) Middle School girl.
Nuko (ぬこ) – Another way of saying cat.
Nushi (主) – The broadcaster.
Pizza (ピザ) – they say “pizza” to call someone fat.