A sexual maneuver in which the male defecates into the females mouth, and then proceeds to slam her face into a wall.

Two extremely hot girls who:
1. if you've met, you'll never forget or
2. if you haven't met, you'd better watch out for.
Also known for hysterical antics at parties, passing out in random dudes' beds, and generally being awesome.

How Chuck Todd described the Presidential Debate on NBC news.

When you cum so hard your dick feels like its about to explode

a broken penis caused by interference with an object or excessive friction similar to railway cars that fold when they run into a car. a trainwreck can occur when a penis runs into a dry vagina or anus or foreign object inserted into either of the aformentioned orifices.