Rotondo vowed to appeal before heading back to his parent's house, Syracuse.com reported. There, he answered their questions, telling them he occupies a bedroom in his parents' home, doesn't speak to them and isn't ready to leave home.
When Rotondo spoke to the media outside the courtroom, he was asked where he would be going to live.
"I really don't want to stay there", he told the New York Post after the court loss. The court fight made the Late Late Show with James Corden.
Judge Donald Greenwood on Tuesday ordered the parents' lawyer, Anthony Adorante, to draft an order outlining the terms of the eviction.
The judge's ruling now pushes Michael Rotondo squarely out of the nest.
Rotondo replied that he found the case in minutes on the internet. Rotondo maintained that what Greenwood was doing was wrong. Rotondo is calling his parent's effort "retaliatory". At one point, the judge called Rotondo up to the bench. He tried to take the podium up with him. Michael is believed to have been upset by the decision, labelling it as "outrageous".
When Michael ignored the letter, his parents wrote up a proper eviction notice with the help of their lawyer.
As for that $1,100 from his parents, Rotondo said it's already gone. In his early twenties, he lived in his own apartment for a period of a year before moving back in with his parents. But nothing worked, so the parents sued him.
Michael argued he should have been given six months' notice before being ejected.
"Michael, here is $1100 from us to you so you can find a place to stay", a letter from February 18 starts.
Rotondo said he had his own business.
Another reporter asked Rotondo if he has a Web business.
"I'm granting the eviction", he said.
"A six month notice is a reasonable amount of time for someone who has been depending on persons for support", he said.
Mr and Mrs Rotondo filed their case with the Onondaga County Supreme Court, near Syracuse, New York on 7 May, after months of unsuccessfully urging their son to leave. It adds, "Be aware that we will take any appropriate actions necessary to make sure you leave the house as demanded".