From the song American Pie by Don McLean:
I was a lonely teenage broncin' buck
With a pink carnation and a pickup truck
But I knew I was out of luck
The day the music died
I started singin'
Could you please tell me what broncin' buck means?
Learn English – broncin’ buck — what does that mean
meaning-in-context
Best Answer
In addition to the link in my comment, the "broncin' buck" expression originates from "bucking bronco", a wild horse that is vicious and difficult or impossible to break in, where "bronco" means an unbroken or imperfectly broken mustang and to buck means to resist.
As a noun, "buck" may also mean a male deer, antelope, etc., a stallion included.