These fast-food brand burns sizzle.

Twitter accounts for Wendy’s, Burger King, Whataburger and beyond piled on IHOP Monday after the company finally explained its temporary but controversial rebrand to “IHOb”: The “b” was for “burgers,” a ploy to raise awareness of the international pancake house’s new venture into the burger game.

“Can’t wait to try a burger from the place that decided pancakes were too hard,” Wendy’s tweeted. (IHOP, in response, tweeted, “We don’t want any beef with you, we just want to share our beef with the world.”)

Burger King, meanwhile, changed its Twitter display name and logo to read “Pancake King.” Whataburger chimed in with, “As much as we love our pancakes, we’d never change our name to Whatapancake.” And White Castle went a similar route, tweeting, “We are excited to announce that we will be switching our name to Pancake Castle.”

Wendy’s has previously established its sassy Twitter brand, sticking a fork in McDonald’s after the company announced in March that it would stop using frozen meat for Quarter Pounders and Signature Crafted Recipe sandwiches in a quarter of its stores.

“Hey @McDonalds, heard the news. Happy #NationalFrozenFoodDay to you for all the frozen beef that’s sticking around in your cheeseburgers,” Wendy’s tweeted, kicking off several posts showing photos of alleged classic McDonald’s burgers that still use frozen meat. And each snap looked sadder and more squashed and overly processed than the next.

Wendy’s then wrapped it up with, “Some people are going to use fresh beef in SOME cheeseburgers, SOME of the time. We believe in using fresh, never frozen beef in every cheeseburger everyday.” Now that’s Frosty.

“We wanted to make sure that people aren’t confused about what is communicated and what is reality,” Kurt Kane, Wendy’s chief concept and marketing officer, told Business Insider.

Fast-food joints aren’t the only ones trolling their competitors for laughs on Twitter. Delta swiped at United last spring with a pro-leggings post after the competing airline was slammed for banning two girls wearing stretch pants from a flight.

“Flying Delta means comfort. (That means you can wear your leggings.)” said the burn from Delta’s official Twitter account – complete with a winking face emoji.

Customers ate it up. It was retweeted 31,000 times, and scored 117,000 likes and counting.

These are just the latest brands building buzz by tweeting not-so-subtle digs at rivals.

It’s even been dished back at Wendy’s. When Wendy’s tweeted a snap of a tray loaded with chicken nuggets, a burger, fries and a soda captioned as “The 4 for $4 meal,” Burger King shot back with pic of a five-piece meal and the dig, “5 for $4, because 5 is better than 4.”

And Merriam-Webster nailed it with this tweet against rival Dictionary.com. The latter posted a pic of a woman holding a cup of black coffee with the “Pemberly by the Sea” quote, “I like my coffee with cream and my literature with optimism.”

Without missing a beat, Merriam-Webster tweeted back “There’s no cream in that coffee.”

Merriam-Webster has also gleefully called out President Trump’s colorful language, tweeting that the world “bigly” exists, but “deproximately” and “braggadocious” do not.

Or how about this 2012 gem, when Old Spice teased Taco Bell’s “fire sauce” for not containing any real fire. The taco chain tweeted back, “Is your deodorant made with really old spices?”

These punchy posts don’t always work, though. Denny’s made customers feel a little queasy with a tweet about eating babies after Beyonce announced she was pregnant with twins.

“Wow, bey has TWO buns in the oven! that’s just an expression by the way. please don’t eat those buns. they are babies,” it posted.

#Fail

This article was originally published on March 31, 2017 and has been updated with new tweets.