A person that takes being an Idiot to a higher level.
My Boss is a Blooming Idiot.
A kid who was born when his father ejaculated into a flower pot. Resulting in an idiot to blossom.
Look at that blooming idiot right there
The opposite of a budding genius, an idiot who thinks he/she is very smart.
Some politicians were remembered as a budding genius, others as a blooming idiot.