Do not do this. It's pretty much impossible to OD on ibuprofen, you would have to eat literal bowls of pills to even have a chance. Even if you did, you would most likely just throw it all up or end up with renal dysfunction/failure.
One of my first overdose/suicide patients was someone who took a whole bottle of ibuprofen and then got scared and called 9-1-1. They were completely fine in the end.