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".
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?