noun
ban on entering; barred from entry
Colloquial abbreviation of 出入り禁止. Used when someone is banned from a place, such as a store, bar, or event.
See also: 出入り禁止
あの客はトラブルを起こして出禁になった。
That customer caused trouble and got banned.
ここは出禁だから入れないよ。
I'm barred from here, so I can't go in.