Noun: A non-descript, generic automobile. A car that totally lacks excitement and has no exciting features.
Grandma drives an old mud bucket.
You must be an old pooter if you like that lame-ass mud bucket.
Some sort of smoking paraphernalia which was scraped and filled with resin.
Stoner 1: I'm feinding for some bud bro.
Stoner 2: I understand, I'll scrape my bowl and we'll smoke a quick mud bucket.
Stoner 1 and Stoner 2: Hooray for mud buckets!
A toilet full of diarrhea
Man, somebody left a mud bucket in the bathroom.
An extreeeeeeeeemmmmmmmmly ugly person.
That chick Aaron fucked was a md bucket.