A stand-up lunch.
A stand-up guy.
An example of something stand-up is a tall, towering tree.
An example of stand-up is a comedian in a comedy club; a stand-up comedian.
An example of someone who is stand-up is a person who supports their principles, even when it is not popular; a stand-up person.
Sometimes the club has music, sometimes stand-up.
How come you weren't at the stand-up this morning?