mackerel skewer
A dish of mackerel grilled on a skewer. Common in izakaya and street food contexts.
I ordered a mackerel skewer at the izakaya.
Internet slang pun on 串 (skewer) and 鯖 (server, from サーバー). Used in tech and online communities.
See also: プロキシサーバー
Access via a proxy server.
Sense 1 is a straightforward compound of 串 (skewer) and 鯖 (mackerel). Sense 2 is a slang coinage: 串 (kushi) is a pun on プロクシ (proxy), and 鯖 (saba) is a pun on サーバー (server).