The 22-year-old issued a stinging response to a Blues fan who had sought to ridicule Arsenal's League Cup loss in 2011 by posting a picture of the England man in tears at Wembley.
The England international was part of the side that suffered a shock 2-1 defeat at Wembley back in 2011, as goals from Nikola Zigic and Obafemi Martins sealed a huge cup upset.
On the anniversary of the defeat, one cheeky Blues fan took to Twitter to send Wilshere a picture of both the England midfielder and his teammate, Wojciech Szczesny, looking despondent after the final whistle, asking: “Recovered yet?”
But he got a response he was not expecting when Wilshere retweeted his remark alongside a stinging reply: “Yes mate just about! Have Birmingham?!?”
The St Andrew's outfit has not come close to returning to English football's top-flight since its 2011 relegation and currently sits in 16th place in the Championship – 14 points shy of the promotion spots.
Arsenal, meanwhile, is in the thick of a title fight at the top of the Premier League table, and will take on Bayern Munich in the second leg of a Champions League last 16 clash in two weeks' time.