Although security quickly escorted the heckler out, Kimmel is hoping that’s not the last time the president hears the phrase.

“Wouldn’t it be a shame if people started yelling that everywhere he goes? ‘Shove that ballroom up your fat ass!’” Kimmel snarked on Tuesday night. “You know what would be even worse? If people started printing it on shirts.”

To illustrate what a shame it would be, he showed off such an item:

“Please, please don’t do this at his next rally tomorrow in Ohio or the next one in South Carolina,” Kimmel said. “Please! It’s beneath us.”

The heckler was referring to the planned White House ballroom, a project Trump has been obsessing over for more than a year. The president initially claimed it would cost $200 million and be paid for by private donors. More recent reports, however, indicate the ballroom’s cost has ballooned to $600 million, with taxpayers covering half of it.

See more in Kimmel’s Tuesday night monologue: