In the latest of a series of controversial remarks on Twitter, the US President-elect hit out at the global body.
While he did not specifically mention the UN Security Council resolution condemning Israeli settlements in the Palestinian Territories — which only passed after the United States abstained — Mr Trump appeared to continuing his earlier criticism.
He wrote: “The United Nations has such great potential but right now it is just a club for people to get together, talk and have a good time. So sad!”
In a previous tweet following the Security Council vote on Friday, he said: “The big loss ... for Israel in the United Nations will make it much harder to negotiate peace.
“Too bad, but we will get it done anyway!”
He also claimed to have brought "hope", which was used as a slogan by Barack Obama, to the world.
"The world was gloomy before I won -- there was no hope. Now the market is up nearly 10 per cent and Christmas spending is over a trillion dollars!" he tweeted.
Mr Trump also hit back at Mr Obama, after the out-going President claimed he would have won the election if he, rather than Hillary Clinton, had been the Democratic candidate.
In an interview with CNN, Mr Obama said: “I am confident in this [his] vision because I'm confident that if I — if I had run again and articulated it — I think I could've mobilised a majority of the American people to rally behind it.
“See, I think the issue was less that Democrats have somehow abandoned the white working class, I think that's nonsense.
“Look, the Affordable Care Act benefits a huge number of Trump voters. There are a lot of folks in places like West Virginia or Kentucky who didn't vote for Hillary, didn't vote for me, but are being helped by this.
“The problem is, is that we're not there on the ground communicating not only the dry policy aspects of this, but that we care about these communities, that we're bleeding for these communities.”
However Mr Trump, predictably, disagreed.
“President Obama said that he thinks he would have won against me. He should say that but I say NO WAY! - jobs leaving, Isis, ObamaCare, etc,” he tweeted.
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