What does this mean?!

[Anxiousninny]

Someone sent me this and I'm not sure if I'm being dumb but I just don't get it?! Can someone please enlighten me?!!

I would assume it’s meant to suggest most polish people wear Slazenger sportswear.

I think it’s quite distasteful.

I wouldn't have a clue either! Any polish people I've seen/spoken to dress just like anyone else around us?!