The potato masher was/is a British wording for the German Army's Stielgranate 24. It was used by every the entire Wehrmacht.
Due to it's shape and appearance it was called potatomasher by the British forces. The video game Call of Duty 2 features this fact. Interestingly the Soviet Red Army's soldiers are calling the stick grenade potato masher also.
Nowadays the German Modell 24 Stielgranate is one of the most easily recognized WWII small arms.
In the USA the Stielgranate is collected like stamps by some collecters. Especially the US soldiers returning home took one or more home with them as a "Souvenir out of the Reich".
Version of term "Grenade" made famous by the cast of Jersey Shore referring to ugly girls. Potato masher is what the allies nicknamed the German grenades in WWII and also refers to the ugliest, fattest and most nasty chicks one encounters.
The act of hiding the evidence that you pooped in a sink or bathtub by smashing your stool with your foot or hand until it has become mashed enough to flow smoothly down the drain. Covering up any evidence that you defiled a bathroom.
I live in a one bathroom apartment but my roommate was using it at the time, so I had to think quick without destroying my pants. So I squatted over the kitchen sink and then proceeded to be a potato masher before my roommate was done in the bathroom.
When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).