A descriptive word for something that is not good.
Synonyms could be: Lame, boring, stupid.
Particularly refers to scenarios.
This word may derive from jail or prison slang.
The word probably derives from the onomotopeia of 'quack'.
Utilizing the actual word:
You are at a party with a bunch of ugly-ass chicks and they're serving cheap beer. You also had to pay to get in. And some drunk idiot keeps switching songs on the player right in the middle of them.
"Hey man, let's get the fuck outa' here. This place is quack!"
Utilizing the actual sound:
You are at the above party, and the ugly chicks are talking to you and your friend but you don't want to offend them (you might drink and dial later). So, you look at your friend, and instead of doing that slight raising the eyebrows nod-thing, you just make the sound "quack", or "eerack, erack" using a twisted-lip, things-are-lame look while possibly rolling your eyes.