Read Dictionary of Contemporary Slang for Free Online Page B

The expressions probably originated in the north of England where ale has been, and remains, a common allpurpose word for beer.
    He’s aled again
.
    alert
adj British
    (of a male) slightly sexually aroused. Related terms, also in use since 2000, include lob-on and semi . ‘It means to be a bit turned on (i.e. having a slight erection)’. (Recorded, London student, May 2003).
    alf
n Australian
    a common, foolish person. In the 1960s this term briefly vied with ocker as the generic term for uncouth manhood.
    alie
See
ahlie
    all about (it)
adj American
    enthusiastic, keen. In use among adolescents and college students since 2000.
    I asked her if she wanted to hang with us
and she was all about it.

I’m all about some basketball
.
    alley, allie
n British
    a marble (as used in children’s games). Like aggie , the word is approximately a hundred years old and refers to a pale orwhite marble. Although rarely heard today, these terms probably survive where the traditional game is still played. The most likely origin of the term is a shortening of ‘alabaster’, from which some Victorian marbles were made.
    alleycat
vb
    to prowl the streets, particularly late at night
    â€˜There’s Arthur Smith alleycatting around, trying to pick up chicks.’

(Kit Hollerbach,
The 39,000 Steps
, Channel 4 documentary on the Edinburgh Festival, July 1989)
    all mouth and trousers
adj British
    blustering and boastful, showing off without having the qualities to justify it. A commonly heard dismissive phrase, typically said by women about a loud or assertive man. There is a suggestion that this is a corruption of the more logical, but rarely heard expression, ‘all mouth and no trousers’, meaning full of talk but deficient in the sexual area. A less racy version is ‘all talk and no action’. There is an analogy with other colourful expressions, now mostly archaic, such as ‘all my eye and Betty Martin’, meaning nonsense, and more abusive versions such as all piss and wind .
    Oh him! He’s all mouth and trousers, that one.
    all over the shop/show/gaff/lot/ballpark
adj
,
adv
    disorganised, in chaos or disarray. The first three versions are British, the last two American. This is a more colourful extension into slang of the colloquial phrase ‘all over the place’, and the first version at least dates from the 19th century. (‘Shop’ is a working-class catch-all for any workplace.)
    allow it, ’low it, allow that
vb British
    to let (something) pass, leave alone, ignore. A key item of multiethnic youth slang, in use, e.g., among South London schoolchildren in 2010, who use it as an injunction to mean ‘stop whatever you are doing’ or ‘no way will I/we do that’. Allow him/her are rarer alternatives.
    all piss and wind
adj
    full of bluster and noise, but without real substance. This expression can have a similar meaning to all mouth and trousers , but can be applied for instance to a politician’s speech or a theatrical performance, as well as to an individual. ‘All piss and vinegar’ is a rarer synonym.
    all right!, awright!
exclamation American
    an exclamation of recognition, greeting, approval or admiration. The ‘right’ is emphasised, high-pitched and elongated when shouted. Used in this way the phrase was originally black American; it was picked up by whites, especially hippies , in the late 1960s.
    alls-bay
n pl American
    the testicles. An item of pig Latin based on balls .
    all that
n
,
adj American
    (a person who is) exceptional, admirable. The phrase is almost invariably used dismissively or to express derision, as in ‘She thinks that she’s all that’. It occurs in black working-class speech and in black and white campus usage, and is probably a shortening of ‘(not) all that much’ or ‘all that great’.
    all up in someone’s business/biznezz/grill/the kool-aid
phrase