It's the opposite of a slam dunk ... in fact it's more like a devastating defeat ... L.A. Lakers exec Jeanie Buss unloaded her L.A. mansion ... for nearly $1 MILLION LESS THAN SHE PAID.
Buss -- ya know the daughter of Lakers' head honcho Jerry Buss and girlfriend of Phil Jackson -- purchased the 4,266-sqaure-foot-digs back in 2007 ... for a cool $2,769,000.
Fast forward 5 years ... Buss recently sold the 4-bedroom, 5-bath-pad for $1.8 million. For those of you with stellar math skills ... that means she lost $969,000 on the sale.
The bright side ... the Lakers are 3-5. And just fired their coach. So not a lot of "bright."
But hey, she's still rich!