flakage

n. the behavior of an unreliable person, aka flake; the result of flaking

"I think I'm going to stop using Craigslist to sell stuff because the flakage factor is getting out of control. Too many no-shows."

below-fi

adj. lower than low-fi; the word you would use to describe the garage-iest sounding garage rock; term used to make really shitty sounding musical instruments seem cool

"Dude, that old beat up drum kit is totally below-fi -- it's perfect for your new garage band."