casual cosplay

Wearing an outfit meant to be reminiscent of a character; not a full costume as it is made of everyday clothing from the wearer's preexisting wardrobe and worn on a normal day rather than at a party or convention, but chosen intentionally to represent the attire of a character.

A more subtle version of cosplay, or "costume play" in which a costume, often elaborate and specific, is worn (usually to a convention).

Conner: Hey, cool outfit. Looks like something Dean Winchester would wear.
Taylor: Thanks; I was already wearing the plaid shirt but I decided to do a casual cosplay and add the leather jacket and boots.