when something happens that may or may not be funny and your immediate response to it unknowingly could be translated literally and make the scenario hilarious
while pedro was trying to pull out a dingleberry
after taking a slam he yelled "piece of crap" as it was being pulled out and then busted out laughing realizing that a dingleberry
was in fact a "piece of crap"...literally hilarious
When you sit down on the can expecting to unload a large deuce but air farts are the only thing that comes out...similar to the phrase shooting blanks
John: "Hey Dave, where are you?"
Dave: "On the can, about to take a huge slam!"
Dave's Butt: "phhhhht"
John: "Ha! You're just pootin' blanks!"