Something you silently mouth to someone to return an "I love you". When you silently mouth "olive juice", it looks like "I love you". A silent "olive juice" is usually used when someone tells you they love you, and you want to keep them, but you're not ready for that.
Man, Christie told me she loved me last night. I don't really wanna take that step yet, but I don't want her to dump me. . .so when i saw that she was waiting for me to say it back, I just mouthed "olive juice" and started making out with her.
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.