Squashed Rat 

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.

Pressing your junk against a window looks like a squashed rat.

Squashed Rat by Scoopalone June 27, 2014

squashed rat 

pressing you dick up against a window (normally car)

I gave him a squashed rat

squashed rat by simon... March 24, 2008

squished rat 

when you press your exposed dick against glass and or a window and it gives the appearance of a hairless rat squished against a window

jon was walking past a mcdonalds ran up to the window and showed the people inside his squished rat

squished rat by allergy August 5, 2006