The word caining comes from a primitive method of stealing from shops especially ones that sell clothes. The process of caining involves pushing a long bamboo cain through the letter box of the shop you are trying to rob and hooking items (IE clothes) off the rails and by tilting the cain upwards the items slide to the mouth of the letter box where they are easily pulled though. The phrase became associated with the UK drug culture in the mid 90's as caining was an easy way of obtaining money to buy drugs.
The word 'cained' refers to being off your face with the money you made from caining.As the price of drugs like Ecstasy dropped as much as 1/20th of the original street price the need for large amounts of money to buy drugs had decreased and the word is now used as a general term that refers to any state of altered consciousness gained through the use of illegal drugs.
If someone is said to be cained it usually means they have taken so much mind altering substances that they are physically incapable of taking any more.
" ...you were caining loads of pills last night dude..
by Snowy_uk_west February 11, 2006
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1. To be overlooked despite outstanding performance due to being overshadowed by teammates thanks to the ignorance of the media, such what frequently happens to San Francisco Giants pitcher Matt Cain after pitching a good game.

2. Alternatively, it can refer to having one's good work spoiled by teammates' incompetence, such as when Matt Cain gives up only two runs but nonetheless loses due to a lack of run support.
Example 1: I discovered a cure for cancer, but my boss took all the credit. I got Cained.

Example 2: I spent months setting up the experiments, but my labmate Cained me by accidentally deleting all the data.
by GoGiants2010 November 12, 2010
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"i did 9 lines last night"
"man you must of been cained"
by dogEH January 15, 2014
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A really great guy in general! Not just a slang word for Cocaine. He is a guy with good intentions. Very Smart and funny. The kind of person you can talk about anything with. Caine's have awesome personalities. Though they can be a little overly sensitive at times. Everyone loves Caine. Caine's are also very attractive. Not only for their looks, but for their personalities as well. Caines are HILARIOUS. They really know how to have a good time and are usually very friendly. In relationships, Caine's are usually very faithful, but tend to flirt a lot with other people. Caine's usually have a lot of people crushing on them.
Person 1: OMG! look there's caine!

Person 2: oh, i know! He's so hot and funny..
by unknowncutie18 November 12, 2011
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Responsible for killing twenty five percent of the early world's population. Killed a larger percent of the human population than any disease or war in human history.
Cain knew three people. He killed one of them. If you knew Cain, you had a seventy five percent chance of survival.
by 44294 June 21, 2010
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The most amazing man to have ever walked the Earth. Beautiful inside and out. Kind, sexy,charming, hilarious, a blast to be around, a true big kid at heart. You will never meet a more perfect man. If there is a Cain in you're life, you're extremely lucky. Don't ever let him go, he is irreplaceable.
"Dam his a Cain"
by 24e February 20, 2010
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from the word cocaine. Another term for cocaine.
Yeah that caine done made me rich
by cocaine706 December 6, 2004
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