Lehman Dump

When individuals who tend not to fart abruptly in public use the toilet for a #2 Job and as a result of holding it in, a sound familiar to that of a 50. Caliber machine gun occurs, capable of ripping apart the porcelain lining of the common toilet.

Holy cow! did you hear that Lehman dump in the room beside us?! I thought we were under attack!

Yeah Mitch's dump was a definite Lehman dump.