What a bunch of fakers.

Investors unmercifully ripped into Twitter on Friday after the social network said the number of monthly users slipped in the second quarter — the result of a company purge of fake accounts.

The takedown of the Jack Dorsey-led company comes one day after Wall Street decimated Facebook because it forecast slower growth.

Both companies have dealt with fake accounts spreading fake news — and the sell-offs reveal that investors’ patience with social networks and their controversial habits is wearing thin, analysts said.

Twitter shares tumbled 20.5 percent on Friday, to $34.12, after the social network said that it lost 1 million monthly active users from the previous quarter.

Twitter warned investors to brace for bigger losses moving forward, citing its efforts to purge bots and spam accounts from its service.

The company is prioritizing tackling suspicious accounts and reducing hate speech and other abusive content over projects that could attract more users, it said.

“We will continue to work hard to improve the health of the platform, providing updates on our progress at least quarterly, and prioritizing health efforts regardless of the near-term impact on metrics, as we believe the best driver of long-term growth of

Twitter as a daily utility is a healthy conversation,” the company said in a tweet.

The lower user data overshadowed the company’s earnings per share of 17 cents — which met predictions. Revenue came in at $711 million, easily outpacing forecasts of $696.2 million.

But Wall Street was in no mood to see past the all-important monthly active user category. Twitter said it ended the period with 335 million users. Analysts expected 338.5 million.

Facebook’s nearly 20 percent stock sell-off on Thursday was the biggest one-day drop in Wall Street history — erasing nearly $120 billion off its market cap.

“It’s been a bloodbath this week for social media stocks,” said GBH Insights analyst Daniel Ives. “It really speaks to a lot more challenges from a growth perspective and a monetization perspective than Wall Street has been anticipating.”

Twitter, like bigger rival Facebook, has been under pressure from regulators in several countries to weed out hate speech, abusive content and misinformation, better protect user data and boost transparency on political ad spending.

Ives said that Twitter’s drop is likely an overreaction, and may turn out to be just a speed bump for “one of the best comebacks in tech we’ve seen in the last decade.”

“If the scrubbing of data and bots and user metrics gives a cleaner metric that’s more reliable, not just for investors but for advertisers, this ultimately could prove to be a smart move at this time that benefits the company over the next few years,” he said.

The company said that it lost some users due to the European Union’s new privacy laws, but did not specify what impact it had on revenue.

Twitter also saw usage fall after saying it would not subsidize messaging fees for users who accessed its app through text messages.