look up any word, like turnt:
 
2.
The feeling you get when you are left hanging for what feels like an excruciatingly long period of time.
Having to wait two whole months before knowing if I got the job gave me a severe case of mental blueballs.
by i.have.no.name. April 23, 2010
 
1.
The result of an increasingly stimulating conversation that has an inconclusive or overly disappointing outcome.

Also used to describe the physical discomfort or displeasure felt after hearing a succession of lengthy jokes with dimwitted or inane punch lines.

Mental blue balls is often characterized by a dull headache or a distinct physical feeling of dismay, despondency, or dissatisfaction as the afflicted individual realizes he just wasted his valuable time and is "left hanging".
Dude, that comic told so many stupid jokes I have mental blue balls.

I got major mental blue balls today after two hours of brainstorming awesome ideas for killer iPhone apps, but no one had any idea how to implement them or even any project plans to get started.
by B.B.L.V. October 05, 2009
 
3.
The very uncomfortable feeling you get when friends talk about a really good story but refuse to tell it to you. It leaves you feeling incomplete and just rotten, similar to physical blue balls.
Friend: OMG that was SO funny. Like srsly the BEST story ever i will never forget it!

You: whats the story guys?

Friend: oh no way man. theres no way we can tell the story its just too funny

You: NOW I HAVE MENTAL BLUE BALLS
by dufbear August 15, 2011