"vicious threat" is a correct and usable part of a sentence in written English.
You could use it when referring to a threat or warning that is especially intimidating or serious. For example, "The business owner received a vicious threat from a competitor, causing him to worry about the safety of his employees."
When I visited a makeshift field hospital, a balding doctor told me that snipers are an especially vicious threat.
Keen to portray the uprising as a sectarian insurrection by extreme elements of the Sunni Muslim majority posing a vicious threat to minorities, Mr Assad has often wheeled out bishops and nuns to express devotion to his regime and to condemn supposed foreign interference.
Landmines pose gravest risk for children NAIROBI/NEW YORK/GENEVA, 2 December 2004 – Millions of antipersonnel landmines and other explosive remnants of war across the globe pose a vicious threat to children, who are being injured, killed and orphaned by them long after wars are over, UNICEF said today.
NAIROBI/NEW YORK/GENEVA, 2 December 2004 – Millions of antipersonnel landmines and other explosive remnants of war across the globe pose a vicious threat to children, who are being injured, killed and orphaned by them long after wars are over, UNICEF said today.
Among them there are two vicious threats.
The singer wrote on his website that during his visit to Moscow he had met gay and lesbian people who had received vicious threats from vigilante groups.
Her "elation" was short-lived as the one abusive tweet soon became a "huge avalanche" and included vicious threats of rape and other violence.
"Kalyapin and his group are practically the only ones who dare do human rights work in Chechnya despite vicious threats and brazen attacks".
Back in April when it was just a bunch of harsh words and vicious threats, the beef between Samsung and Apple was pretty entertaining.
Dissent elicits vicious threats.
Constantly updating network security systems is essential to cope with the crafty attacks and vicious threats of computer viruses, worms, spyware and hackers [ 14].
