A person who does not fit in to any group. The strong silent type, always observing and analyzing situations before getting involved. May have a lot to say but does not say it. Often settles problems alone and is more than capable of it. For the few who get to know him/her a close and loyal friend they will find. A black cat is a nomad, forever roaming the world. A black cat may seem shy to some but make no mistake, he/she is merely bored and is thinking of greater things. Black cats are not judgemental and are easy to confide in. A beloved friend, though not always around. They may not understand your affection toward them, but will always return friendship. A black cat is extremely good at figuring people out, as a result black cats fall in love easy after accepting all your faults and your trust. They can fall for more than one person resulting in bad luck. When a black cat is your lover only death can keep you apart, but not for long. The person you want to cross paths with, The perfect lover and loyal best friend, a black cat roaming.

Lying flat refers to a defeatist lifestyle in Chin, where people stop working, desiring material acquisition, and tap out of any social life – sometimes for good. By lying flat, young people are participating in a kind of non-cooperation movement, rather than surrendering themselves to China's oppressive work culture where they see little hope of social mobility.

Some believe they're bad luck. Some say that's racist. I say Its just a cat it's not racist or bad luck. Well it is bad luck if you're a mouse.

Mostly well-known as a major brand of fireworks. In a classic episode of "Reno 911", the two black cops, Officers Jones and Williams go to the home of a weird hippie who is stockpiling fireworks that are illegal.

So Officer Jones picks up a package of Black Cat fireworks, saying "You know Black Cat's are illegal in the state of Nevada." The hippie responds with "You guys are a couple of black cats."

an illegial firework
and in an Hollywood Undead song called Scene kids for dummies
they say
"I could barely walk around cause the dance floor was so packed
I walked to the back and lit off some black cats - BAP BAP BAP hahaha!"

Small firework that you throw in people's lawns when they least expect it.

The very best anime, ever