noun. This can refer to anything--from bras to shirts to pasties to gold stars--that covers cleavage.
Related terms: boobage footage, boobage slippage, boobage leakage, boobage spillage.
Real citation: "i'm making carmilla from d2k-bloodlust, and the boobage-coverage is a bare minimal. anyone who knows me knows that that's half the reason i wanted to make this costume (hooray for scandalous costumes!)... but i have few ideas for how to make the ... small amount of fabric... err... stick to the twins. *sigh*"
(Ladt Somairot, http://forums.cosplay.com/archive/index.php/t-245.html)
Made-up citation: "In these days of fiscal irresponsibility and ballooning deficits, we as a society must question every penny spent on public education, missile defense, boobage-coverage, faith-based initiatives, and other special interest projects."