Meaning of “Saba(鯖)”

“Saba(鯖)” means “server” as a slang. On internet, sometimes you can see this word.
*The basic meaning of “Saba(鯖)” means mackerel which is fish name.

“SabaOchi(鯖落ち)” means “server down”.
“Ochi(落ち)” means down.

Example Conversation

A: Oh, maybe I can’t play a online game…
B: Why?
A: Because of “SabaOchi(鯖落ち)”

A: うわー、今日ゲームできないかも。
B: なんで？
A: 鯖落ちしてるらしい