While Daniels has certainly alluded to her feelings about the alleged relationship she had with Trump, her new, explicit, and direct comments on the president's anatomy sent Twitter into an early morning tizzy.
The porn star, whose legal name is Stephanie Clifford, has also claimed that Trump was in favour of seeing her on his show 'The Apprentice'.
TBS late-night host Conan O'Brien said, "In her new memoir, Stormy Daniels described President Trump's penis as being like the mushroom character in Super Mario Brothers. Like a toadstool. I lay there, annoyed that I was getting fucked by a guy with Yeti pubes and a dick like the mushroom character in Mario Kart". She then goes on to say that Trump's penis was "smaller than average" but "not freakishly small".
While the world awaits an explosive POTUS tweetstorm in response, others have been quick to share their reactions on social media.
Trump has denied the affair but his lawyer Michael Cohen has pleaded guilty to campaign finance violations linked to US$130,000 (RM538,000) in "hush money" he paid Daniels shortly before the November 2016 presidential election.
Full Disclosure is set to be released on October 2.
The revelation of Trump's sexual encounter with Daniels sent shockwaves across the USA.
Bob Woodward, the renowned journalist famed for his acclaimed reporting on the Watergate scandal, recently released a book that lifts the lid on the simmering tensions within the White House.
The book, "Full Disclosure", was obtained by the Guardian, which described its various scenes. It's kind of a cheap shot, and it really isn't right to body shame anyone, even the President.
It was supposedly Trump's plan to have her cheat, and not hers.
"Then, to make it crazier, Hillary Clinton called", Daniels wrote.
Before we get into why that was, we're going to give you a chance to turn back.