What does bump your head on mean?
bump your head on
Definition
To hit your head on something low by accident.
Example sentences
My brother's so tall he bumps his head on the door frame every time he visits.
My brother's so tall he bumps his head on the door frame every time he visits.
I bumped my head on that shelf again this morning — I don't even swear about it any more.
I bumped my head on that shelf again this morning — I don't even swear about it any more.