Stewart, who used to host the iconic Daily Show, is no stranger to bashing the Republican and branded Mr Trump an “angry tax and draft-dodging little orange groundhog” ahead of the November elections.
Making a new appearance on the Late Show on Tuesday, Mr Stewart made his thoughts on the businessman’s first week and a half in office perfectly clear as he turned up with a dead animal strapped to his head.
The former TV host was also dressed up in a red tie which went down past his feet as he mocked Donald Trump’s fashion sense.
Amused by the attire, presenter Stepehn Colbert said: “I’ve gotta say, I love your outfit. Is this your Donald Trump impression?”
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Jon Stewart mocked Donald Trump on the Late Show
To which the Stewart replied: “I thought this is how men dress now. The president sets men’s fashion. And I saw the inauguration: super long tie, dead animal on head. Boom!”
Following up on Colbert’s introduction of him, Mr Stewart declared he had bought with him a bundle of new executive orders yet to be announced by the Republican President.
He thundered: “By the authority vested in me by the Constitution, I, Donald J. Jonah Jameson Trump, hereby direct that, to secure our border, China shall immediately and without hesitation send us their wall. Done.
“When the wall arrives at the southern border, we shut the lights and pretend we’re not home. It’s C.O.D (collect on delivery)., Mexico has to sign for it.”
The former TV host also mocked the outfit Donald Trump wore during his inauguration ceremony
The new official language of the United States is bulls***
Taking a dig at the Trump administration and the “alternative facts” row which erupted after the White House insisted more people had attended the businessman’s inauguration than Barack Obama’s in 2009, Stewart said “bulls***” was the official new language in the United States.
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He said: “I, Donald J. Lincoln Kennedy Trump III do pronounce America now finally has an official language. No, it’s not English.
“The new official language of the United States is bulls***. bulls*** all the time. Immersion—it’s the only way to be fluent.”
Unable to hide his disdain, Stewart also tore into Mr Trump for being “exhausting” and said he had a natural desire to abuse his power.
“Announcing” the executive order, he said: “I, Donald J. Trump, do declare by executive order that I, Donald J. Trump, am exhausting.
Being President Trump: Key Moments
Tue, January 31, 2017
Inside Donald Trump's first week in the White House.
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US President Donald J. Trump attends a meeting on cyber security, in the Roosevelt Room of the White House, in Washington, DC, USA, 31 January 2017
“It has been 11 days, Stephen. Eleven f****g days. The presidency is supposed to age the president, not the public!”
“I, Donald J. Trump, am exhausting because it is going to take relentless stamina, vigilance, and every institutional check and balance this great country can muster to keep me, Donald J. Trump, from going full Palpatine, with the lightning coming out of the fingertips and the ‘fear leads to anger, anger leads to hate.’ We have never faced this before—purposeful, vindictive chaos.”
Turning his mocking impression of Mr Trump into a plea for Americans to take up the fight against the Republican.
“But perhaps therein lies the saving grace of I, Donald J. Trump’s presidency,” he said.
“No one action will be adequate. All action will be necessary. And if we do not allow Donald Trump to exhaust our fight and somehow come through this presidency calamity-less, and constitutionally partially intact, then I, Donald J. Trump, will have demonstrated the greatness of America, just not the way I thought I was gonna.”