Fine.

Cameron: Matthew, do you want to play Legos?
Matthew: Okay, fine.
C: Matthew, why do you always say, "Okay, fine?" You should just say "Okay!"
M: Okay, fine.
C: No! See, that's what I mean! Just say "okay." Okay?
M: Okay. Fine.
C: Arghhh! Matthew! Say "okay."
M: Okay.
C: Good!
M: Fine.