The phrase "a slew of bad" is correct and usable in written English.
It can be used to describe a large number of negative things or situations.
Example: "The report highlighted a slew of bad decisions made by the management team that led to the company's decline."
Alternatives: "a multitude of negative" or "a variety of poor".
And the country, seemingly forever unsettled and unhappy, is having a slew of bad days.
A slew of bad investments, notably in a wireless-internet venture, has turned him into a marginal player now.
McDonald's has received a slew of bad press lately amid criticism from workers, customers and even its own franchisees.
The 'old Britney' might have used the occasion for serious partying, generating a slew of bad headlines, but instead the scene was sedate.
Until recently, City investors viewed a rate rise this month as a certainty, but have been hurriedly reassessing that prediction after a slew of bad economic news.
In recent days, Tokyo's bid appeared to be fading amid a slew of bad news from the Fukushima Daiichi nuclear power plant, 140 miles to the north.
He also got a slew of very bad polling data.
Scores of problems have been claimed: intentionally scribbled-on petitions, physical altercations about petitions, fake names on petitions, and a slew of screamed bad words (not to mention at least one egg) exchanged over petitions.
This basic orb-shaped hors d'oeuvre not only serves as the taking-off point for the plot, about a runaway from a religious sect called the Squeamish, but also provides the essential conflict among the main characters, the answer to a perplexing mystery and a slew of gloriously bad metaphors.
Chase prevailed on both points, and once this Rubicon had successfully been crossed, the floodgates opened: in the wake of the suburban mob boss came a slew of very bad cops (The Shield), dysfunctional undertakers (Six Feet Under), drug king-pins (The Wire), and murderous pimps (Deadwood).
A slew of boyfriends, bad dates and Mr. Wrongs led me to my soulmate and life partner, Derek.
