Congrats on the DD! It's well deserved
I think it's some squadron insignia.
This logo first appeared during Polish-bolshevik war and was used by 7th Fighter Escadrille, in which American volunteers served (including Merian C. Cooper, the director of King Kong). It presents American stripes (which happen to correspond with Polish flag's colors) and stars, and crossed scythes (popular peasant weapon during Kosciuszko uprising) under a hat worn by T. Kosciuszko during said insurgency.
After the 1920, it was adapted by 111th Fighter Escadrille, from which many pilots of 303. Squadron originated, and was then chosen as the Squadron's official emblem.
Currently the traditions of 303. Squadron are continued by 1st Tactical Squadron, which operates MiG-29s, including this one. It's tail fin also has a portrait of Miroslaw Ferić, one of 303. Squadron pilots.
Plus here in Poland, we're taught about 303. Squadron and other Polish units since primary schools. If you haven't read it already, I really recommend Arkady Fiedler's "303. Squadron", it's an epic book about the exploits of that formation, I think it was translated to English several times.
Congratulations on your well deserved DD!