When a girl preludes a loogie in her mouth while with-holding massive amounts of cum in her mouth. She then spits it in your asshole to produce a spatling.
by BowWowBigDick July 14, 2008
A sexual manuver so risky, one could say it is personal murder or castration. It is when you partake in anal sex and shove both shaft and testicles in your partners anus. WARNING: COULD LEAD TO TESTICULAR RUPTURE
1)Jeremy and Patty were engaged in anal sex. Jeremy said, "Look out dear! Murdertrain 's a'coming." Then I fucked your mom.
2) Did you hear? Jeremy popped his balls doing the murdertrain!
2) Did you hear? Jeremy popped his balls doing the murdertrain!
by BowWowBigDick July 14, 2008