When you got a million things to do and you don't want to do it. Then a friend comes along and reminds you that you need to do it. Then the answer is simply "Yup".
"Dude you need to do this, this, this and this," says a friend.
"Yup."
You use this term when your girlfriend decides to break up with you when you think you're in a steady relationship. This term is commonly followed by a "ok, sounds good" as your heart slowly dies.
(verb) To go somewhere or do something with a group because you want to be with them, and not because you want to go to the place they are going or do the thing they are doing.
*Luke and the squad are going out to get something to eat*
Luke: Wanna come eat with us at Zaxby's Jack?
*Jack had lunch 10 minutes ago and he is not hungry at all*
Jack: Bro I'm not hungrytho and I need to study.