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.

n. The birth name of somebody who has changed their name. Most commonly attributed to trans people, but can be attributed to any person who has changed their name. (sometimes written as two words: dead name)

v. 1. To call somebody by their deadname.
v. 2. To out somebody's deadname to the public.