Fanum is a streamer that is part of the streaming group "Amp" he is a fat fuck who takes other peoples food who lives in the house, he calls it "Fanum Tax"
When someone gifts you something and it has the brand/logo of the person/company on it so that you advertise it for them making it a win/win situation.
Mr. beats gifts you a car with his logo on it that is a fanum tax.
Fanum Tax is when you see somebody eating food but you are too poor to get food and you are fat as fuck you take some of their food and say "Sorry, Fanum Tax!" And then run away with food or you can do it to a friend and give them a percentage.
The slang term "Fanum tax" is a form of tax that is set into motion when a person purchases an edible item. The persons friend will then tax a percentage of their food (take it against there will). It was made popular by the person known as "Kai cenat".
Fanum tax is basically a tax given by streamer fanum. For example if someone is trying to eat you can take some as part of the "fanum tax".
"I will take some as part of the fanum tax" - Person 1
"No please dont im poor and i really need this food im in crippling debtplease no" - Person 2
"haha yummy burger yum yum yum yum" - Person 1