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1. noun: a bus that has the sole purpose to transport homeless bums around New York.

2. noun: a person that is just not the brightest (head = bus, brain = bum)
that guy is a total bumbus look at his test score HOLY S**T
bumbus by yeetus christ May 27, 2017
Related Words
The definition of pure maniliness, born from the depths of hell out of the pussy of Satan himself, then killed Satan and took his place where he ruled over hell for many melennia.
Bumbus then became bored of hell and ascended to the over-world where he caused chaos where ever he went with his army of slaves and orphan Jews. He now spends his time making dank memes, playing video games, and fucking mad puss.
"Wow, that guy is just like Bumbus, the man of legend."
Bumbus by The-Lord-Bunbus November 15, 2017
Noun: Most often times it is used as an expression to someone/something as a means to show disdain for a lack of skill, or failure to complete a certain task.

Adjective: The word can mean almost anything as an adjective and almost completely relies on connotation and context in which the word is used. Overall when given a negative connotation, bumbus can indicate or refer to one being dull, lacking quality/structure, or be a euphemism to the male genetalia. When given a positive context, the word itself seems to have no explanation or meaning, and it is left up to the audience of the word to infer exactly how/what the user was implying.

Bumbus can also be an alternate use of boneless.
Brent quit being such a bumbus!

Have you ever tried duck meat before? I heard it was bumbus.

Wanna know why I'm so good at Fortnite? Because I'm bumbus!

Can I get a uhhhh... Bumbus pizza?
Bumbus by koonbassoon June 19, 2018
Noun:

1. The anus of an animal
2. An artillery piece
3. A doctrine that uses manpower as artillery, especially farting. The only resource you need is manpower
Uh oh... There is a bumbus attack. Detected high amounts of Hydrogen Sulfide in the air. Hide!
bumbus by Drakjat March 22, 2025
a cretin or idiot who usually is a class clown of some sort
look at that guy, he is such a bumbus
bumbus by thatblondguy April 16, 2025

Bumbus Dungus 

a commonly used curse phrase that can be used in various curses the most basic of which is cursing people around you to laugh at old memes such as Big Chungus.
Chojo: "hey did you see my friend josh yesterday? He couldnt stop laughing at Big Chungus!"

Joko: "Watch out man Carson has been cursing people with the Bumbus Dungus curse."