Unisex sports jersey

In "I Am a Grumpy Old Man: My Level of Sarcasm Depends on Your Level of Stupidity," the protagonist likely embodies the quintessential curmudgeon, someone who has seen it all and is not afraid to express his disdain for the world around him. The jersey he wears could serve as a symbol of his personality—perhaps it’s a vintage sports jersey that reflects his nostalgia for a time when things were simpler, and people were more genuine.

The jersey might be worn and faded, much like his patience for modern society. Its colors could be vibrant, contrasting with his grumpy demeanor, suggesting that beneath the sarcasm lies a passion for the things he loves, such as his favorite sports team. The choice of jersey could also be a source of sarcasm itself; he might wear it ironically, poking fun at the overly enthusiastic fans around him who take sports too seriously.

Overall, the jersey serves as a visual representation of his character yet nostalgic, sarcastic yet passionate, and a reminder that even the most cynical individuals have their own quirks and preferences that define them.