Chrissy Teigen took a swipe at Donald Trump on Twitter this week, firing the opening salvo in what became a heated social media feud between the supermodel and the Republican presidential candidate.

On Sunday, Trump tweeted that he expected to meet with a group of African-American pastors at Trump Tower in New York, a meeting the candidate said was not open to the press.

Teigen, wife of music superstar John Legend, quickly fired off an incendiary tweet calling Trump a “t–t.”

The supermodel was quickly inundated with backlash from the Republican candidate’s supporters, and Trump himself got involved by retweeting a message that suggested Teigen isn’t as classy as Trump’s wife, Melania.

Teigen took a snapshot of Trump’s re-tweet and captioned it: “The greatest birthday gift ever.”

The supermodel followed up with two tweets taking shots at Mrs. Trump:

Days before the exchange with Trump, the outspoken Teigen responded to the shooting at a Planned Parenthood facility in Colorado:

Teigen celebrated her 30th birthday with Legend, family, and friends on Saturday night.