Fancy pants is about to face off with, well, everyone. 

In E! News' exclusive first look at The Real Housewives of Orange County's explosive season 17 midseason trailer, Heather Dubrow is going to war with nearly all her costars. Especially Tamra Judge and Shannon Beador, who find out from the Internet that Heather has a major life update.

"Heather and Terry Dubrow sell their home for $55 million," Tamra tells Shannon, who replies dumbfounded, "Why wouldn't she mention it to us?"

And later, Tamra alleges Heather made fun of Emily Simpson's appearance. "She told Emily that she looked like a Snuffleupagus," the 55-year-old says before a full-on screaming match kicks off. Emily's response? "So, it's OK to body-shame?!" 

Then there's the mysterious gossip Heather shared off camera about Shannon's relationship with ex-boyfriend John Janssen, which fans first learned about on the Bravo series' July 26 episode.

Shannon seemingly confronts her frenemy by screaming, "You owe my boyfriend a huge f--king apology!"

All the drama ends up being too much for Heather, who declares in the preview, "I am tired of being everyone's whipping boy."

But Heather isn't the only source of drama. Emily yells at Shannon over the phone, "You are two different people, Shannon. You are Jekyll and Hyde and I am tired of it!"

And if you thought Tamra was finished bringing up BFF Jennifer Pedranti's past infidelity—she allegedly begun her relationship with boyfriend Ryan Boyajian while she was still married—you thought wrong.

"You ruined your whole family," Tamra screams at Jennifer, who shouts back, "How f--king dare you."

See everything still to come—including RHOC alum Vicki Gunvalson whooping it up while doing keg stands, Tamra peeing her pants and the tropical cast vacation—in the trailer above.

The Real Housewives of Orange County airs Wednesdays at 8 p.m. on Bravo.

(E! and Bravo are both part of the NBCUniversal family)