1.Agreeing with something that somebody says.
2.A response to someone getting an attitude with you after you asked them a question.
3.What you should say when you're confused about something, after your confusion has been cleared up.
1. Man I'm hella hunry.
Say that then, let's go to Jack in the Box.
2. Hey, when you going to work?
At 2:00, I already told you that.
Oh, well damn, say that then!
3. Aye, we're going to the club.
The one by your house.
Oh, Club Eleven?
Naw, the other club.
Club Duece Eight?
Aw, well say that then!