justin

Action to drop something with a strong impact. Either because it soiled the floor, the clothes, or because the object breaks (usually with a lot of noise)
It is also possible to justin yourself or to justin a part of your body when we bump our elbows on a table for example.
It is generally the result of a great clumsiness

Dude 1: "Oh shit I just justin my mug full of coffee"
Dude 2: "Seriously dude! On my pants? Stop justining things damn!"