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armed and dangerous

Possessing a weapon and likely to use it. Typically said of criminals, especially fugitives. The most wanted fugitives on this list are all considered armed and dangerous.
See also: and, arm, dangerous

on shaky ground

Questionable or lacking support, as of an idea. His hypothesis has been on shaky ground to since the beginning, so I'm not surprised that he couldn't prove it in the lab.
See also: ground, on, shaky

live dangerously

To lead a lifestyle characterized by taking risks. Sometimes used humorously to refer to a very mildly risky action. Most of the guys I know who live dangerously eventually get tired of life in the fast lane and end up settling down. A: "Extra hot sauce?" B: "Yeah, I like to live dangerously."
See also: live

on dangerous ground

In a position that poses danger to onself e or that is likely to upset or offend others. I may be on dangerous ground with this opinion, but, as a mother myself, I really don't think women should breastfeed in public. You're on dangerous ground as long as you continue to antagonize him—I've seen him become violent.
See also: dangerous, ground, on

dangerous ground

A topic or thing that is likely to upset or offend others. I may be on dangerous ground with this opinion, but, as a mother myself, I really don't think women should breastfeed in public.
See also: dangerous, ground

*armed and dangerous

Cliché [of someone who is suspected of a crime] having a gun or other lethal weapon and not being reluctant to use it. (This is part of a warning to police officers who might try to capture an armed suspect. *Typically: be ~; be regarded as ~; be presumed to be ~.) The murderer is at large, presumed to be armed and dangerous. The suspect has killed once and is armed and dangerous.
See also: and, arm, dangerous

little knowledge is a dangerous thing

 and little learning is a dangerous thing
Prov. Cliché If you only know a little about something, you may feel you are qualified to make judgments when, in fact, you are not. After Bill read one book on the history of Venezuela, he felt he was an authority on the subject, but he wound up looking like a fool in discussions with people who knew a lot more about it than he did. A little learning is a dangerous thing.

on shaky ground

 and on dangerous ground
Fig. [of an idea or proposal] on an unstable or questionable foundation; [of an idea or proposal] founded on a risky premise. When you suggest that we are to blame, you are on shaky ground. There is no evidence that we are at fault. The case for relying solely on nuclear energy seems to be on dangerous ground.
See also: ground, on, shaky

little knowledge is a dangerous thing, a

Also, a little learning is a dangerous thing. Knowing a little about something tempts one to overestimate one's abilities. For example, I know you've assembled furniture, but that doesn't mean you can build an entire wall system; remember, a little knowledge . This maxim, originally a line from Alexander Pope's An Essay on Criticism (1709), has been repeated with slight variations ever since. It is still heard, although less frequently, and sometimes shortened, as in the example.

live dangerously

Take numerous risks, be daring, as in Bill never knows if he'll have enough money to pay the next month's rent-he likes to live dangerously . This expression figured in the work of such 19th-century German writers as Nietzsche, who regarded it as an admirable course of action. Today it is often used with mildly humorous effect, as in the example. [c. 1900]
See also: live

dangerous ˈground

a situation or subject that is likely to make somebody angry, or that involves risk: We’d be on dangerous ground if we asked about race or religion.
See also: dangerous, ground
References in periodicals archive ?
The jury will today continue deliberations on eight charges against him of causing death by dangerous driving, and four counts of causing serious injury by dangerous driving.
A 34-year-old man has been charged with causing death by dangerous driving, driving with no licence, and driving with no insurance.
Buildings near the banks of the Soan River were dangerous, the official said, and their owners had been asked to vacate them as soon as possible.
He said, the owners of dangerous buildings were issued notices before onset of Monsoon season to get the buildings repaired or vacate them.
The Classification of Dangerous Goods in Accordance with the International Maritime Dangerous Goods Code (IMDG)
UPS helps companies meet strict and often complex requirements when shipping dangerous goods, said Teresa Finley, UPS Chief Marketing Officer.
As many as 36 school buildings have been declared dangerous in Rawalpindi Tehsil, 35 school buildings in Kotli Sattian and 23 buildings in Tehsil Murree.
The retailer was convicted at Southwark Crown Court earlier this week of four counts of causing dangerous goods to be delivered for carriage in an aircraft, a breach of air safety regulations.
Tsai and Cheng were charged with 'manufacture' and 'possession' of dangerous drugs while Lin was charged with possession of dangerous drugs.
Yet to my eyes, Ah Van made no attempt to put his 'victim' into a dangerous position.
In the 12 months up to and including June 2015 there were 60 dangerous driving crimes in Kirklees, of which five were death by dangerous driving offences.
The Birmingham Mail's exclusive analysis of open crime data from the Home Office reveals that in the 12 months up to June 2015 there were 99 dangerous driving crimes in Birmingham, of which five were for death by dangerous driving.
He blasted: "To be nasty and to be abusive and to use language to associate certain counties with the Taliban - that's dangerous.
Uzbekistan Airways has extended the right to transport dangerous goods through the airports of China, the company's press service reports.
com)-- Dangerous Goods International (DGI) today announced the official openings of three new offices throughout Australia and the United Kingdom.