When a male presses his entire genitalia against a transparent, hard surface such as a window or a CD case. The resulting visual resembles a rat that has been crushed to death.
It is like mooning someone except with a dick and balls.
This one-liner may be used during an alien invasion, especially when you're a badass who is out to kill the beasts from outer space.
It is also possible to get the phrase as a dirty joke, according to the youtube celebrity Jesse Cox from the youtube channel "OMFGcata", who first came up with this sentence during his playthrough of the game "Crysis 2".
You killan alien with your mere hands. You mention that you are choking a squidhead. You throw his corpse away.
NOTE: Strahm-squashed refers to Special Agent Peter Strahm getting squashed to death by the coverging walls at the end of Saw V as Hoffman safely looks on in the glass box (Strahm thought he trapped him in), which lowers into the floor for safety as the walls in the room begin to close, making Strahm trapped, as a result, mangly squashing him to death.
Unfortunately, Strahm failed to hear out the whole tape when when the tape told him to get in the glass box to save his life, causing Strahm to ignore the rule, as a result, making him fail the test, causing his fate. To tell you the truth, he was death-trapped anyway, whether it was the glass box or the converging walls.