When someone puts you on speakerphone without you knowing it; then you say something embarassing, or insulting about someone in the room.
Person with speakerphone: Hey whats up?
You: Nothin much, dont tell so and so i said this...
Person with speakerphone: you just did, your on speakerphone!
You: DUDE! you speaker-jacked me!
Most commonly occurring in a committed relationship or close proximity roommate situation. It is the act of putting ones own show/music/etc on speakers before the other domestic resident can put theirs on speakers, thus forcing them to use headphones. Most relevant when the other party had theirs on speakers first, and due to an interruption they paused/muted their sound, and upon cessation of the interruption, the first party puts their audible content on speakers.
- WTF? I was watching DS:9!
- Hah! Speaker Jacked, bitch!