I'm in a dark locker room putting on a wrestling costume. There are small windows along the top of the wall and it's pouring rain outside.
Dreams involving costumes often represent the idea of role-playing or taking on a different persona. In this particular dream, you may be exploring a more aggressive or competitive side of yourself represented by the wrestling costume. The dark locker room and the rain outside suggest that this exploration may be connected to some negative emotions or circumstances that you are currently experiencing. It's possible that this dream is prompting you to confront or address these emotions by embracing a more assertive and competitive approach.