having to take a crap.
Dude, I have gotta bust a grumpy.
To have to go number 2.
To make naughty water.
Brennen had to go bust a grumpy, becuase he'd tried to move and built up enough bodily waste to kill an elephant.
The phrase "bust a grumpy" is used to refer to anything that is excreted through the anus, including both gas and feces. To properly bust a grumpy, one must abide by the following rules:
-Claim that he or she is going to "bust a grumpy"
-Excrete something (be it solid, liquid, or gas) from the anus.
Tom:"Dude, I'm gonna bust a grumpy!"
Walter:"Oh, no! Wait!"
Walter:"Oh, man! Everybody watch out, Tom's bustin' grumpies!"
Passing a large usually unwilling stool that is rocky hard and very large.
Joban: I gots to go bust a grumpy before i shit my pants.
Jovan: Make sure you dont miss the bowl again.
The act of farting extremely loudly and abruptly.
Damn bro did you just bust a grumpy? I can smell it all the way over here!
having an orgasm, especially when one has an angry-looking o-face
After getting 20 minutes of head, he would bust a grumpy all over her face