A grassroot campaign for Macy’s Inc. (NYSE: M) to dump real estate mogul Donald Trump is gaining traction, with nearly 500,000 people signing a petition for the department store to sever ties with him.

The petition created by Angelo Carusone on SignOn.org argues that Trump doesn’t reflect the “magic of Macy’s” and he “engages in especially unpleasant, nasty and despicable behavior.” It has received 465,497 signatures as of Tuesday morning, with people saying it’s time for Macy’s to act.

Among some of the reasons listed for Macy’s to dump Trump is his alleged “sexist behavior,” his recent misleading the public that American jobs will be shipped to China (even though those claims have been denied), and his continuing the birther conspiracy claim that President Barack Obama isn’t a U.S. citizen and is therefore, unfit to be the nation’s chief executive.

Trump, an active Twitter user, is also famous for his Twitter rants. He had a complete meltdown on the microblogging site after Obama won the 2012 election.

“Well, back to the drawing board!” Trump tweeted after networks called Ohio for Obama. “We can't let this happen. We should march on Washington and stop this travesty. Our nation is totally divided!”

Trump also recently offered to give $5 million to a charity of the President’s choosing if Obama would release his college records and passport application.

The mogul is yet to specifically address the petition, but he did take some time on Monday to do some marketing over the microblogging site.

“Just saw my new line of shirts, ties & suits @Macys -- they are fantastic! Would make great holiday presents!” he tweeted.

And on Tuesday, Trump reminded, "My fragrance--"Success"-- is flying off the shelves . The perfect Christmas gift!"

Some famous names have said they will boycott the department store after finding out it sold Trump’s product line.

“I’ll NEVER GO TO MACY’S AGAIN ! I didnt know they sold Donald Trump’s Line! If they don’t care that they sell products from a LOUDMOUTH,” singer Cher tweeted.

Trump’s spokesman Michael Cohen told the New York Daily News that he’s confident in the relationship the mogul has with the megastore.

“Mr. Trump is important to Macy’s, both as a brand and as an endorser,” Cohen said. “His ties, shirts, cufflinks, fragrances and other merchandise are top-selling items across the country – in particular Mr. Trump’s ties are the number one selling ties at Macy’s.”

Cohen also told the New York paper that Trump, like everyone else, is entitled to freedom of speech.