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8.
A cheap brand of "all-purpose" smoking tobacco - one of the earliest packaged, branded pipe tobaccos in the U.S. - with the slogan "a cargo of contentment in the bowl of any pipe." A long-standing joke involving the product's name asserts that it is named "half and half" because it is comprised of "half horseshit and half bullshit" (in reality, the mixture is half "bright" and half "burley" tobaccos). Some old-timers speculate that the half and half joke may have given rise to the novelty "horseshit cigarettes" sold in the U.S. in the 1920s-30s (not real horseshit), which featured the slogans "not a fart in a carload," and "try one, you mooching bastard."

Half and half is still sold at most retail outlets carrying tobacco products.
"Cargo of contentment," my piles - half and half is harsh and bitter.
by Rod Brock July 24, 2006
 
9.
A meaning for half high Half drunk.
Man i was Half and Half last night.
by jman9123 May 01, 2009
 
10.
A person who is of mixed race.
Demetrius is half and half. Half black and half white.
by Pimpin August 04, 2003
 
11.
usually at a late night Curry House, you order a portion of curry and being undecided whether you want it served with rice or chips (french fries) you ask for ".......curry half and half."very popular with students after a big night out.
He asked the waiter " Chicken curry, half and half". i.e. a portion of chicken curry served with half a portion of chips and half a portion of rice.
by Ex Student. August 24, 2010
 
12.
A drug cocktail containing one half a 30mg Adderall and one half a 10mg Valium. The effect is a balance of the best aspects of cocaine and ecstasy. A counter-intuitive mix as the pharmaceuticals work at cross purposes, but the synergy induces a euphoric energy which is free from anxiety. Impaired memory is a side effect of the Valium, which can be another benefit, depending on what you did whilst under the influence of the cocktail.
"Big night planned at Rose."

"I'm definitely in, and tonight I'm rolling with a half and half. No way my sinuses can survive another coke binge."
by Spencer's Cocktail January 22, 2009
 
13.
A beverage made up of half cold beer and half warm urine served to the biggest asshole at a social event after he's bummed every one out.
Dude, after that asshole started in with his superior attitude and kept bragging about the number of foreclosures he's done, Johnny fixed him up with a half and half .
by Vox 19 July 22, 2008
 
14.
a rolled joint consisting of half tabacco and half weed.
this shits good so just roll like 3 half and halfs and we'll be good.
by Mr. 420 October 06, 2006