FAAF - A lazy, American version of saying thank you that sounds lik

A lazy, American version of saying thank you that sounds like someone said ‘fart’ and then got angry.

My mom said ‘FAAF’ after I gave her coffee. She probably meant thank you but it sounded like she was mad at my brother.

My friend said ‘FAAF’ when I helped him move. It was confusing but I still got a pizza.

At the restaurant, the waiter said ‘FAAF’ after I paid. I thought he was mad at the food.