A derogatory term for someone with a tendency to spoil things, or create problems.
eg. "Everyone was keen to head to the after hours club, but Mark made us drive him home. What a douche bonnet."
by Berus November 14, 2011
The driver of a truck that has a crappy bonnet on it.
"That guy is such a douchebonnet."
by Iesus Christus March 18, 2008