A black hole, according to the general theory of relativity, is a region of space from which nothing, including light, can escape. It is the result of the deformation of spacetime caused by a very compact mass. Around a black hole there is an undetectable surface which marks the point of no return, called an event horizon. It is called "black" because it absorbs all the light that hits it, reflecting nothing, just like a perfect black body in thermodynamics. Under the theory of quantum mechanics, black holes possess a temperature and emit Hawking radiation, but for black holes of stellar mass or larger this temperature is much lower than that of the cosmic background radiation.

Despite its invisible interior, a black hole can be observed through its interaction with other matter. A black hole can be inferred by tracking the movement of a group of stars that orbit a region in space. Alternatively, when gas falls into a stellar black hole from a companion star, the gas spirals inward, heating to very high temperatures and emitting large amounts of radiation that can be detected from earthbound and Earth-orbiting telescopes.
"Astronomers have identified numerous stellar black hole candidates, and have also found evidence of supermassive black holes at the center of galaxies. After observing the motion of nearby stars for 16 years, in 2008 astronomers found compelling evidence that a supermassive black hole of more than 4 million solar masses is located near the Sagittarius A* region in the center of the Milky Way galaxy."
-qoute from british astronomer
by SMEGHEAD61 June 21, 2010
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They say nothing can escape a black hole, not even light. However, this is not true. Chuck Norris can escape a black hole. Chuck Norris eats black holes, they taste like chicken.
Chuck Norris + black hole = no black hole
by James Lowe November 20, 2007
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Jim: Do you hook up with Lynn last night?

Carl: Yeah...she's freaky. I'm normally not into butt sex but her black hole was so fine it just sucked my wang up in there.
by Long Dong July 11, 2005
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A swirling vortex which spews blood and ninja gore when a ninja mikes creating the most obnoxious sound ever. *Origin: N+
by Araballz January 24, 2009
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Your stomach after the act of smoking marijuana, when it cannot be filled and it forces you to continually consume food.
After we smoked, Abdullah ate an entire box of hamburger helper and ordered a large pizza because he couldn't fill his black hole.
by Zabdullah January 27, 2012
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A black hole is a region of spacetime from which nothing can escape, not even light.
black hole is formed from a large cloud of gas which collapsed and broke up into individual stars.
by Dert August 31, 2005
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Blackhole is simply a black person's anus. Instead of sucking everything in it, it burst out vile and feces. Usually the blackhole is brown on the outer side and dark purple closer to the hole.
John(white): Nigguh, your blackhole stink like your mama's pussy!
Joly(black): shuh yo bitch ass whitelo. (taking off his boxer with shit dipping on it.)
by Yaway June 01, 2009
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