A bucket head is someone who is very dumb and is usually excluded from social gatherings. Bucket heads are lonely and often contemplate life and why they should bother living.
1. Captain Murphy's imaginary girlfriend on "Sea Lab 2021". Constructed from a mop and an upside down bucket with a poorly drawn face. She is somewhat of a slut.
2. Name given to the hated girlfriend or wife of a friend. Her true name is irrelevant.