#1 - July 12, 2013, 4:40 p.m.
Moneybrau costs 1000g from a rare vendor in the Brawler's Guild.
According to a comment from wowhead.After drinking this you will get a buff for one minute and occasionally throw up piles of gold on the ground. The piles of gold can be looted by anyone nearby and usually contain 60-80 gold. You throw up about 10 times over the minute that you have the buff so you are going to be losing about 300 gold from each of these that you drink. Could be a fun roleplaying item or an interesting way to give your friends gold.
Mystery solved.