Pessidog
Pessidog (noun) :

Kids below 15 years of age who are rarely or even never watch football games at all, but make bold claims such as : National league is Easy, Copa America is bigger than World Cup, only goal matters in football, penalty is the most difficult thing in football, and that Leonel Messi (a.k.a. Pessi) is the greatest footballer of all time.

They often come up with fake stats or fake quotes just to convince everyone how Pessi is better than Ronaldo the G.O.A.T.

Despite being born mostly due to condom failure, they have serious talent to be a stand-up comedian in the future as their logic is already a joke.
"What is a brain, dad?"
"No idea, son. We are pessidog"

My friend has down syndrome but he still looks like Albert Einstein when compared to a pessidog.
A boy having no knowledge about football and saying pessi is better the ronaldo that describe pessidog