You can't make this stuff up.

After leading the U.K. out of the European Union, former London mayor Boris Johnson has decided he's not up for dealing with the Brexit aftermath.

At a press conference on Thursday, Johnson announced he won't be running for the leadership of the Conservative Party and becoming prime minister. 

Johnson was previously considered the favourite to succeed David Cameron, who resigned last week following the Brexit vote. 

To make things even more confusing, Tory MP Theresa May — who backed the Remain side — is now one of the leading candidates in the race. 

Johnson's announcement came as a surprise, to say the least. 

Still reeling from the results of the EU referendum, Twitter users began sharing their impression of #Borexit.

Actor Ewan McGregor didn't mince words, calling Johnson "spineless" and his Leave campaign "ludicrous."

Many users called out the politician for failing to finish what he started and leaving the cleanup to someone else.

Comedian Matt Lucas, who resembles the former mayor, is well-known for his impersonation of Johnson. He took to Twitter to express his second-hand embarrassment.

Johnson says Brexit will be a breeze, but whoever ends up replacing David Cameron will need to negotiate terms with EU leaders, dealing with questions about immigration and the economy.