It looks like Donald Trump is still holding a grudge after Twitter sparring with Mac Miller a couple of months ago. The billionaire tycoon threw another shot at the Pittsburgh rhyme-slinger regarding his upcoming album.

Miller's second effort, 'Watching Movies with the Sound Off,' is due to arrive on June 18, and Trump thinks it's going to flop miserably.

"Little Mac Miller's next album may bomb. He can't use my name again for sales," he wrote to his 2 million followers.

Miller, being the cool guy that he is, took Mr. Trump's diss in stride. He simply tweeted a smiley face [ :) ] back at him.

Folks on Twitter were bemused by Trump's tweet and wondered if this was some sort of marketing ploy.

"Does Donald Trump really hate Mac miller or do they have some promotional contract together where Donald helps promo Mac?" questioned one commentator.

In any case, Miller has a lot on his plate right now.

His album is dropping on the biggest release date of the summer, June 18.

The 'Blue Slide Park' rapper will have to contend with Kanye West's 'Yeezus' album as well as J. Cole's 'Born Sinner' LP, both of which are hitting stores on the same day.