Polish Gas Mask
The act of cupping your hand over your butt when farting, and then covering an unsuspecting person's nose and mouth with a handful of stank ass. The Polish reference being that a gas mask is supposed to filter harmful toxins, not contain them within the mask, defeating the purpose of a gas mask.
I felt a steamer building up so I reached around, let it rip, and gave my girlfriend a Polish gas mask and she almost gagged.