Not for the first time this season, Liverpool fans on Twitter are all laughing at their local rivals following a big faux pas on Everton's website.
The Blues have steadied the ship since appointing Sam Allardyce but still trail Jurgen Klopp's side by nine points in the Premier League table going into the Boxing Day fixtures.
Everton managed to secure a 1-1 draw at Anfield earlier in December and Allardyce suggested his team "mastered" the Reds.
"Clear-cut chances for them were very few and far between for such a talented outfit," said the new Everton boss.
"They had three shots on target, we had two. That shows how we mastered a really good side."
Incredibly, Everton haven't beaten their fierce rivals in all competitions since 2010 - and haven't won at Anfield since 1999.
What Everton are selling on their site
Liverpool fans on Twitter have noticed something very embarrassing being sold on Everton's official club website.
The photograph used on the t-shirt is actually Liverpool fans standing in the Kop end ahead of a fixture against Leeds United in 1969.
Jamie Carragher, who grew up as an Everton supporter before becoming a Liverpool FC legend, retweeted the viral tweet posted by Joe Spencer.
It appears that Everton have swiftly removed the t-shirt from the website - but the damage had already been done.
The Toffees haven't finished above Liverpool since the 2004/05 season, playing in the Champions League for the only time in their history.
Carragher was less than convinced by Everton's decision to appoint the former Sunderland manager due to his personality.
"The force of Allardyce’s personality, how he has presented himself over many years, is a problem to the Gwladys Street," Carragher said.
"There is a fine line between being self-confident and self-promoting, and to be blunt the Everton fans believe Allardyce has been on the wrong side of that.
"The most cherished managers in Merseyside football were super-talented and humble. In the city of Liverpool, people who talk themselves up are cut down swiftly, becoming figures of ridicule.
"Allardyce's quotes about his managerial abilities have been often mocked by Everton and Liverpool fans – neither of whom would imagine he would one day manage their club."
The Goodison Park faithful can have no complaints with Allardyce thus far in his tenure.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: https://www.givemesport.com/writeforgms