What does ah hum mean?

"Ah hum" is a sound used to clear one's throat or gain attention. It's often used in these ways:

* To signal that someone is about to speak - especially if they want to interrupt a conversation or get someone's attention.

* To cover up a cough or other throat clearing sound - This can be done subtly or more dramatically, depending on the situation.

* To express hesitation or uncertainty - This is usually used in a more subtle way, often when someone is trying to figure out what to say next.

In summary, "ah hum" is a versatile sound that can be used in different ways to communicate different things.