???????

I'm so mad, I could spit!

Hmmm...I never really understood that term. I am pretty mad at the moment, but spitting really does not sound like something that I would enjoy doing.  I am not really a fan of any sort of body fluid, so spitting just seems nasty.  I guess if you were REALLY mad at someone, you could spit on them, but again...not really my thing.

Another saying that I just never understood?

F*** me running.
Maybe I have just over thought this, but I am pretty sure it is physically impossible to accomplish this task. But feel free to give it a try and get back to me if I am wrong!