merf 

One word most people will say, "Hey that's my word!" or "I made that word up!"

Sometimes used as meh.

Used to show confusion.

Math Teacher: M times(3+489 to the 76th power) times IDT divided by E, times the square root of RM to the 32nd power...

Students #1, #3, #10008: WHAAAAAT?
Student #2: merf.
Hermione-like student: M+I+D+T+E+R+M!
All other students: Groan!
Loki: *sets school on fire*

merf by Loki January 14, 2004

Merf 

1.(noun)A very attractive female that is very obnoxious and annoying.

1. That bitch is hot yo.
Ya...to bad she's a merf.

Merf by Govi Banks March 28, 2005

Merf 

The sound a small dog makes to get attention; also used by humans attemtping to communicate to their dogs.

Human enters room MERF!
Dog's ears go up, comes towards master
WOOF!

Merf by Anonymous September 19, 2003

Merf 

To make a mistake. The term results from the step-by-step transitioning as follows:

1. Fucked up
2. Muffed up
3. Merfed up

Also, a slurring of "motherfucker" which can be used in polite public.

After erasing a large data file from his computer, Tony's friend said, "Dude, you merfed up big time!"

Merf by S. D. Plissken March 25, 2005

Merf 

A sound of sadness, depression, or arrogance. Usually used in a "Facebook" status.

Example:

Bob Smith: Merrrrf =(

or

Jim: Hey Fred, whats wrong?
Fred: I feel Merf-y today :/

sad Depressed =( [: :(

Merf by Kamenosuke August 17, 2010

merf 

shows slight dissapointment and annoyance. mostly used online and not accualy said.

"sorry, i lost your pen that i was going to return."
"merf"

merf by Looscannon April 12, 2004

Merf 

"Narf" + sighing, or a remark meaning you are confused.

Merf! That was a long day's work!

Merf by Zeldapika November 9, 2003