All stocks not listed on a national exchange, i.e. Nasdaq, AMEX, or NYSE are considered Over-the-Counter (OTC) stocks. OTC stocks quoted on the OTC Bulletin Board (OTCBB) are sometimes referred to as OTCBB stocks. OTC stocks quoted on the Pink Sheets Electronic OTC Market are sometimes referred to as Pinkies or Pinksheet Stocks. Likewise, on the lowest rung, stocks on the Grey Market are also considered OTC stocks. (Pink Sheets may at their discretion publicize quotes for securities on the Grey Market).
However they are all OTCs, BLLN included
"You can't be a real country unless you have a beer and an airline - it helps if you have some kind of a football team, or some nuclear weapons, but at the very least you need a beer". F Zappa