One of the biggest groups of Donald Trump supporters on the internet has accidentally called for his impeachment in a meme approved by thousands.

Thousands of people on the Reddit group /r/The_Donald "upvoted" a post reading "Share if you agree the President of Puerto Rico is an idiot and should be fired for incompetence".

"He's absolutely destroying the budget," the post was captioned.

The subreddit is known for its slavish devotion to the president, with moderators of the forum blocking Redditors who log on to criticise Trump.

A graphic from /r/The_Donald (left) and the post that called for his dismissal. (Reddit)

But /r/The_Donald did not realise they had been trolled by a sneaky Redditor intent on embarrassing them.

The user who posted the meme would be banned from the subreddit six hours later.

Trump has been criticised for his administration's response to Hurricane Maria , which knocked out power for the US territory's 3.4 million people.

"Trump's Puerto Rico visit is a political disaster," The Atlantic headlined their article.

After waiting two weeks to visit the storm-ravaged island, Trump drew the scorn of Puerto Rico by tossing paper towels into a crowd like they were basketballs, and telling the governor that Maria was not a "real catastrophe like Katrina".

"Now I hate to tell you, Puerto Rico, but you've thrown our budget a little out of whack," he said during his visit.

"Because we've spent a lot of money on Puerto Rico, and that's fine. We've saved a lot of lives."

He defended his actions in an interview with former presidential candidate Mike Huckabee.

"They had these beautiful, soft towels, Trump said.

"Very good towels. And I came in and there was a crowd of a lot of people. And they were screaming and they were loving everything. I was having fun, they were having fun."

After San Juan mayor Carmen Yulin Cruz begged the White House for help, Trump lashed out at her on Twitter, telling users "politically motivated ingrates… want everything to be done for them".

The death toll for Hurricane Maria is now 43, and nearly 90 percent of the island is still without power.