Panel 1:
Xeno and Zombie Custer
Xeno: Zombie Custer, you reek. Have you been drinking?
Zombie Custer: Yep.

Panel 2:
Xeno and Zombie Custer
Xeno: It's a bit early for that, don't you think?
Zombie Custer: It's 5 o'clock somewhere.

Panel 3:
Xeno and Zombie Custer
Xeno: It's closing time, somewhere, too.