I'm okay

Really means I'm good, satisfied, content... so don't ask me again.

Usage:

Wife: Are you okay, dude?
Dude: Yes, I am.
Wife: But you don't look okay, are you sure?
Dude: I'm okay, hun... I am.
Wife: Tell me what this is all about now.
Dude: I'm really really really okay... okay? Are you okay???