your bummed 

A term originating from an infamous World of Warcraft guild on the Stonemaul-US Server. Players from <YOUR BUMMED> are known for their relentless griefing, trolling, and racist pranks. The name of the guild comes from the term "bum" which refers to killing a player in the air, or in some other place where they cannot reach their body and are forced to spirit rez.

The expression "your bummed" has been generalized into an expression used when anything unfortunate happens to a player. The gramatical error included in the guild's name is there intentionally for trolling purposes.

"Don't let those fags from <YOUR BUMMED> in the raid, they're a bunch of assholes"

"You missed gladiator by 1 rank? Dag bro your bummed"

"I bummed this bad rogue yesterday, took a great screenshot of it for the forums"

your bummed by Travis Henrickson November 14, 2009

your bummed 

Attempting to belittle others in an escape from thinking about drilling a nice hairy man hole. Not to act on homosexual tendencies driven by inadequacy.

I can't talk or think about invading a mans brown eye, so Your Bummed.

your bummed by snwod March 31, 2009

Bumped your head 

You thought wrong

(Very common in the California Prison System, & on the streets)

John can you loan me some money

You bumped your head, no way am I going to loan you any money.

Bumped your head by Kconnor56 July 1, 2010

have you bumped your head? 

It essentially means you have you lost your mind? or it can be used to express your hatred or dislike for a particular activity or person, similar to kms.

"Moe's is better than Chipotle."
"Have you bumped your head?!?"
or

"This traffic makes me want to bump my head."

or
"Help! I have bumped my head and I can't get up!"

have you bumped your head? by colls42 December 4, 2013

Fell and bumped your head 

Meaning you must be seriously crazy. That you or someone else is experencing a really dumb moment at that time.

After Jimmy made the dumbest comment I ever heard I said fool you done "fell and bumped your head"

Fell and bumped your head by darrin2000 November 29, 2007