out of the loop

Etymology
Originating around the 1970s, and thought by some to have roots in computer or telephony terminology.

Prepositional phrase

 * 1)  Not informed, up-to-date, or current; not included in a process or discussion.

Translations

 * French: hors du coup
 * Japanese: 蚊帳の外
 * Polish: nie w temacie
 * Russian: не в те́ме, не в ку́рсе, не в курса́х
 * Spanish: fuera de onda