The act of leaving your boyfriend or husband while at a public venue such as a club or bar to go fuck a stranger you met and then return to your husband or boyfriend at that same venue a short time later.
Don't worry about my husband, he'll wait here patiently for me while I go flinging.
Changing something, particularly within a group of people, that affects everyone. This change can be seen as uncomfortable or different, and will not go unnoticed, however small it is.
When Evan pulled the lunch table forward, if only a few inches, he had fenged up the shui for everyone sitting at it.
Emily: Stop fenging up the shui by trying to switch us to 2% milk!