Overdesigning means creating something with too many complicated or unnecessary details, making it less useful or attractive.
Overdesigning can make things look messy or confusing. It can also make things harder to use.
Examples:
She is overdesigning the website.
Overdesigning the dress made it too heavy.
The architect is overdesigning the building.
He is overdesigning his sandwich with too many toppings.
The cake was overdesigned with too many decorations.
Stop overdesigning the toy, it's already perfect!