UK informal, C2, too extreme and not suitable, or demanding too much attention or effort, especially in an uncontrolled way. (exaggerating)
Printing the entirety of the application form may be a little over the top, so if you would like to omit this then please feel free!
I thought the decorations were way over the top.
The speech was a bit OTT.
He realised he'd gone over the top with the seating arrangements