What does "rustbucket" mean?

An old, neglected vehicle, usually a car, a freighter, or a truck.

What is a synonym for "rustbucket"?

Common synonyms include: jalopies.

noun, slang

noun, slang ·Uncommon ·College level

Noun

1
An old, neglected vehicle, usually a car, a freighter, or a truck. slang
"That sagging old rustbucket is designed like a garbage scow!"

"This car is a veritable rustbucket."

From rust + bucket.