He's my lobster

Phoebe: Hang in there. It's gonna happen!

Ross: Okay, now, how do you know that?

Phoebe: Because she's your lobster!

[At a loss, Ross looks at Chandler.]

Chandler: Oh, she's going somewhere.

Phoebe: Come on, you guys, it's a known fact that lobsters fall in love and mate for life. You know what, you can actually see old lobster couples walking around their tank, you know, holding claws…