1. A fart.
2. To fart.
3. (used as as exclamation of disappointment, frustration, annoyance, disgust, etc.)
EX. Poot. It appears I need to come up with an example involving pooting, but I can't think of a situation involving something like the awful shawarma poots the Avengers probably had after the end of their first film's final after/during credits joke.