A term used by people who show lack of understand but just need to say something because they can't keep their mouth shut. Or used as a means to get out of questions, favors or tasks.
"Yo! Gimme back my bubbler, you've had it way too long."
-"Huh"
"Tell Paul to make some food, I'm starving in this barn you call a house."
"Huh?"
Used by lots of people in the internet to show confusion. The - is used to show a cut off sentence.
It can be used in a sentence as well. There you go, a good fuckin explanation.
Person 1- I have a crush on you
Person 2- where is this going-
Person 1- I love you
Person 2- Huh-