Source - medieval times, where healers would feel lumps bumps on scull, trying to diagnose the illness
The ones with the largest bumps and lumps were likely delirious and didn't make much sense.
So, the term having your bumps felt is usually a retort to a statement or remark from a person, or a situation where the issue is quite bizarre, or unbelievable or stupid.
Can't believe he stuck his hand in that stuff..."He needs his bumps felt"
I would have put blocks under that truck ..."when he gets out of hospital, he should consider having his bumps felt"
You "Having Your Bumps Felt Today" ....that was crazy !!