Arrearage

In terms of cosmetic surgery, it's a bulbous plastic contraption last seen trailing behind Nicki Minaj or Kim Khardashian.

In terms of finance, it's an amount past due. Being in arrears is the act of having something overdue, like a mortgage payment or child support. Arrearage represents the actual money due. So you might say "I'm in arrears on my mortgage and the arrearage amounts to $2,000." (See: Arrears.)