An approximate mathematical formula used to compare and contrast the size of a woman's breasts to the size of her ass. Typically if one is bigger than the other, the woman in question has a skewed or poor tits- to- ass ratio - If the two are relatively proportional, then she has an ideal tits- to- ass ratio. In some cases, the formula can be trivialized when the woman's good looks outweighs both of those factors.
"Sarah's got them titties tho"
"Yeah but her Rebello's ratio is all off, man
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.