Someone who gets people's hopes up with talk about unity and peace. Someone who gives people a false sense of morale, which doesn't really do anything for them.
At least if the guy/girl who wasn't a morale booster/motivator wasn't going to do anything for anybody else, he didn't lie to them to make them feel like everything was going to be better than it was. Lighting a fire under somebody'sass is really just a way to get somebody else do what you want them to do, or be in line with your agenda, and being a morale booster/motivator is not much different.
A Shackteau is a humble, weather-beaten, structurally questionable shelter located in a spectacular or highly coveted place—Wales, Jackson Hole, Sun Valley, Crested Butte, coastal Maine, the Alps—where the building itself may be worth almost nothing, but the dirt, view, access, and mythology make it absurdly valuable.
In use:
Shackteâu - We thought it was an abandoned shed until the realtor called it a rare alpine Shackteâu with unobstructed views and listed it for $2million.