A fartbanger is defined as a 4 cylinder (4 banger) front wheel drive car equipped with an oversized muffler. It literally sounds as if someone is farting in an empty beer can. Typically these vehicles are driven by inexperienced drivers who derive thier skills and value set from playing Grand Theft Auto and watching Fast & Furious.
In example, any older model front wheel drive car is a perfect candidate to become a Fartbanger. Just hacksaw off the factory exhaust, slap on a crappy piece of junk megaphone type muffler and viola... You have a Fartbanger. Oh, don't forget to add a really dumb looking spoiler and maybe some stickers too.
N. Something that at one point in time would have fetched an excellent market price, but because of seller greed and overpricing it didn't sell and because of market change it suddenly became such a rotten, stinkydeal that the item could only be sold below cost.
Jim could have sold his home before the housing market collapse, but he held firm on an astronomical price. Now, he has a real fartburger on his hands.
A fatbagger is a bargain hunter buying large amounts of products (often expensive brands and products) when they are on sale. From the meaning of filling a big shopping bag with products making the bag a fat bag.
As a real fatbagger he enjoyed shoppingbig when the price was right
A person who goes on a simple hike but proceeds to wear a fanny pack, or fag bag, and claims that it is a "practical hiking gear satchel" and has unnecessary energy bars for the hike.
"Dude, the hike is only a mile long to the lighthouse, why bring the fag bag?"
"Hey, you can never be too prepared! I also have a compass and flashlight."
"You're such a fagbagger."