Former president Barack Obama has mocked Donald Trump with a “crowd size” joke, at the Democratic National Convention (DNC). 

Obama, who has previously spoken of his heartache at seeing the surge of anti-trans legislation across the US during Trump’s presidency, sent the crowd wild with his speech. 

“This weird obsession with crowd sizes,” he said, using both hands to display different sizes, seemingly with a hint of innuendo, which brought roars of laughter and load applause from the audience. 

A repost of the video has been captioned “Barack Obama’s crowd size joke might be the biggest burn in political history.” 

In other tweets, the moment has been described as “incredible” and “hysterical”, while some have suggested it will “live rent-free in Trump’s head”.