A piece of furniture built for the sole purpose of manipulating the human body into an ergonomic position to receive a human fist into the bodily orifices
Firthing is the act of hanging around the object of your affections looking intense but never actually telling them how you feel. The term is named for Colin Firth who played Mr. Darcy in a film adaption of Pride and Prejudice and spent a lot of time "firthing."
Rather than just tell her crush how she felt, Rebecca chose instead to spend the entire party firthing in his general vicinity.
In a group larger than two, when one party makes a comment, and the remaining parties reach the samepunch line at the same time. Thus canceling out each others joke and leaving an awkward silence.
Guy 1: "Guy 3, what is the weirdest thing you have ever put your finger in?"
Guys 2 & 3, Simultaneously: "What was her name?"
"I've dated too many women to remember."
Guy 1: "... Would you two stop joke fisting, its making me uncomfortable."
The act of taking an airy shit. Sounds like a continuous fart with intermittent plops. One of the mostrelieving shits, as usually the turds were blocking all the air from exiting the ass.